Pengaruh Customer Relationship Management, Service Quality, Dan Brand Image Terhadap Customer Loyalty Dengan Customer Satisfaction Sebagai Variabel Intervening : Studi Pada Pengguna Aplikasi MC`Donalds Di Jakarta

Authors

  • Irham Maulana Universitas Negeri Jakarta Author
  • Osly Usman Universitas Negeri Jakarta Author
  • Nadya Fadillah Fidhyallah Universitas Negeri Jakarta Author

DOI:

https://doi.org/10.63822/sfxzs136

Keywords:

Customer Relationship Management, Service Quality, Brand Image,Customer Loyalty, Customer Satisfaction

Abstract

This study aims to determine the influence of Customer Relationship Management, Service Quality, and Brand Image on Customer Loyalty, with Customer Satisfaction as an Intervening Variable: A Study of McDonald's App Users in Jakarta. This study provides a theoretical contribution to the development of marketing and consumer behavior studies, particularly in the context of app-based digital services in the fast food industry. The conclusion that Customer Relationship Management, Service Quality, and Brand Image have a positive and significant effect on Customer Satisfaction, and that Customer Satisfaction has a positive and significant effect on Customer Loyalty, supports and strengthens the results of previous studies in the realm of relationship marketing and customer satisfaction. Specifically, this study expands the application of these concepts to the McDonald's digital app environment. Thus, this study can serve as a theoretical reference for further research examining customer satisfaction and loyalty in the context of app-based digital services.

References

Achmad, R., & Solekah, N. A. (2022). How the Customer Trust and Customer Satisfaction Mediate Brand Image and Service Quality on Customer Loyalty in Islamic Microfinance Institutions. Al Tijarah, 7(2), 103–114. https://doi.org/10.21111/TIJARAH.V7I2.6881

Afiftama, I., & Nasir, M. (2024). The Effect of Brand Image, Brand Trust and Customer Experience on Brand Loyalty. Jurnal Ilmiah Manajemen Kesatuan, 12(1), 191–202. https://doi.org/10.37641/JIMKES.V12I1.2403

Al-Gasawneh, J. A., Anuar, M. M., Dacko-Pikiewicz, Z., & Saputra, J. (2021). The impact of customer relationship management dimensions on service quality. Polish Journal of Management Studies, 23(2), 24–41.

Ali, A. A. (2024). (PDF) Creating Customer Satisfaction and Loyalty with Price, Product Quality, and Service Quality (Case Study at McDonald’s Customer). Journal of Research in Business and Management.

Amalyah, M., Putri, D., Hussein, A. S., & Handrito, R. P. (2025). The Impact of Electronic Customer Relationship Management (e-CRM) on e-Loyalty. Jurnal Ilmiah Manajemen Kesatuan, 13(5), 4191–4202. https://doi.org/10.37641/JIMKES.V13I5.3600

Asdhion, A., Badruddin, R., & Trisusilo, A. (2025). The Effect of Brand Image, Product Quality, and Price on Customer Loyalty Through Customer Satisfaction on Brand in the City of Bengkulu. Musamus Journal of Agribusiness, 8(1), 15–28.

Bobâlcă, C., Gătej(Bradu), C., & Ciobanu, O. (2012). Developing a Scale to Measure Customer Loyalty. Procedia Economics and Finance, 3, 623–628. https://doi.org/10.1016/S2212-5671(12)00205-5

Bulan, T. P. L., & Sriwulan, T. (2021). Pengaruh Kualitas Produk Dan Harga Terhadap Loyalitas Konsumen Mitana Café Di Kota Langsa. Jurnal Samudra Ekonomika, 5(1), 11–20.

Damayanti, A., Ahmad, S., Aldrin Akbar, M., & Lina, R. (2024). Service Quality and Trust on Customer Satisfaction. Advances: Jurnal Ekonomi & Bisnis, 2(5), 255–267. https://doi.org/10.60079/AJEB.V2I5.296

Dertli, H. I., Hayes, D. B., & Zorn, T. G. (2024). Effects of multicollinearity and data granularity on regression models of stream temperature. Journal of Hydrology, 639, 131572. https://doi.org/10.1016/J.JHYDROL.2024.131572

Dewi, W. E., & Auliya, Z. F. (2025). Model Stimulus-Organism-Response (SOR): Peran Trust sebagai Mediasi dalam Keputusan Pembelian Produk N’Pure di TikTok Shop. Paradoks: Jurnal Ilmu Ekonomi, 8(3), 775–790.

Emaluta, F., Isnalita, & Soewarno, N. (2019). The Effect of Customer Relationship Management (CRM) To Customers’ Loyalty and Customers’ Satisfaction as Mediator Variables. Jurnal AKSI (Akuntansi Dan Sistem Informasi), 4(2). https://doi.org/10.32486/AKSI.V4I2.49

Evilia, Y. G., Zakaria, M., Bahri, S., & Fadilla, M. (2025). A Quantitative Analysis of CRM Strategies on Customer Satisfaction and Loyalty: A Case Study in Space Rental Service Business. Jurnal Sistem Teknik Industri, 27(3), 154–161. https://doi.org/10.32734/JSTI.V27I3.19891

Fatimah, S., Idrus, M., Mukhtar, A., Salam, K. N., & Ismawati, I. (2022). Study On Service Quality On Customer Satisfaction And Loyalty. Jurnal Manajemen, 26(3), 512–532. https://doi.org/10.24912/JM.V26I3.938

Frenredy, W., & Dharmawan, P. (2020). Dimensi Brand Image Untuk Memprediksi Brand Love Dan Brand Loyaty. Jurnal Manajerial Dan Kewirausahaan, 2(4), 1005–1014.

Guerola-Navarro, V., Gil-Gomez, H., Oltra-Badenes, R., & Sendra-García, J. (2021). Customer relationship management and its impact on innovation: A literature review. Journal of Business Research, 129, 83–87.

Hair, J., & Alamer, A. (2022). Partial Least Squares Structural Equation Modeling (PLS-SEM) in second language and education research: Guidelines using an applied example. Research Methods in Applied Linguistics, 1(3), 100027. https://doi.org/10.1016/J.RMAL.2022.100027

Hair Jr, J. F., Hult, G. T. M., Ringle, C. M., Sarstedt, M., Danks, N. P., & Ray, S. (2021). Partial least squares structural equation modeling (PLS-SEM) using R: A workbook. Springer Nature.

Harmawati, E. S., & Dewanti, R. L. (2023). The influence of brand image, service quality, and customer satisfaction on repurchase intention. Journal of Management and Business Insight, 1(1), 41–47.

Hidayat, M. A., Rasyid, A., & Pasolo, F. (2024). Service Quality on Customer Loyalty: Mediation of Customer Satisfaction. Advances in Business & Industrial Marketing Research, 2(3), 150–163. https://doi.org/10.60079/ABIM.V2I3.158

Icam Sutisna. (2020). Statistika Penelitian. Universitas Negeri Gorontalo, 1–15.

Jatmiko, H., & Reni, N. K. A. (2023). Effect of Brand Image and Service Quality on Customer Satisfaction Study on Kaganga Coffee Makassar | Hasanuddin Journal of Applied Business and Entrepreneurship. Business and Entrepreneurship.

Joshi, A., Kale, S., Chandel, S., & Pal, D. K. (2021). Likert scale: Explored and explained. British Journal of Applied Science & Technology, 39(6), 398–403.

Keshavarz, Y., & Jamshidi, D. (2018). Service quality evaluation and the mediating role of perceived value and customer satisfaction in customer loyalty. International Journal of Tourism Cities, 4(2), 220–244. https://doi.org/10.1108/IJTC-09-2017-0044

Kholifah, N., MS, M., & Roslina, R. (2024). The Influence of Customer Relationship Marketing and Brand Image on Customer Loyalty with Customer Satisfaction as a Mediation Variable (Study on Starbucks Coffee Indonesia). JOURNAL OF ECONOMICS, FINANCE AND MANAGEMENT STUDIES, 07(03). https://doi.org/10.47191/JEFMS/V7-I3-16

Ledro, C., Nosella, A., & Vinelli, A. (2022). Artificial intelligence in customer relationship management: literature review and future research directions. Journal of Business & Industrial Marketing, 37(13), 48–63.

Lindayani, L., & Napia, R. N. (2023). Examining The Effects Of Service Quality And Brand Image On Customer Loyalty: A Study Through The Lens Of Customer Satisfaction. Business Innovation and Entrepreneurship Journal, 5(3), 199–209. https://doi.org/10.35899/BIEJ.V5I3.692

Lolemo, S. E., & Pandya, H. B. (2025). Customer e-satisfaction as a mediator between e-service quality, brand image, and e-loyalty: Insights from Ethiopian digital banking technology. Journal of Digital Economy, 4, 1–15. https://doi.org/10.1016/J.JDEC.2025.05.005

Ma’azzah, N., & Prasetyo, A. (2023). The Influence of Brand Image on Customer Loyalty through Customer Satisfaction as Intervening Variable on Skincare Products. Airlangga Journal of Innovation Management, 4(2), 219–228. https://doi.org/10.20473/AJIM.V4I2.50401

Magatef, S., Al-Okaily, M., Ashour, L., & Abuhussein, T. (2023). The impact of electronic customer relationship management strategies on customer loyalty: A mediated model. Journal of Open Innovation: Technology, Market, and Complexity, 9(4), 100149.

Millán, Á., & Esteban, Á. (2004). Development of a multiple-item scale for measuring customer satisfaction in travel agencies services. Tourism Management, 25(5), 533–546. https://doi.org/10.1016/J.TOURMAN.2003.07.002

Naim, A., & Alqahtani, K. (2021). Role of information systems in customer relationship management. Pulse, 2(2), 18.

Nasution, M. I., Fahmi, M., & Prayogi, M. A. (2020). The quality of small and medium enterprises performance using the structural equation model-part least square (SEM-PLS). Journal of Physics: Conference Series, 1477(5), 52052.

natswa, fida maulida, Winanti, W., Adella, A., Nurwati, M. I., Sidiq, I., & Riyanto, F. (2024). The Influence of Customers Satisfaction and Consumer Loyalty on Corporate Reputation. Journal of E-Business and Management Science, 2(2), 389–397. https://doi.org/10.61098/JEMS.V2I2.203

Nicolescu, L., & Rîpa, A. I. (2024). Linking innovative work behavior with customer relationship management and marketing performance. Journal of Innovation & Knowledge, 9(4), 100560.

Nilashi, M., Abumalloh, R. A., Ahmadi, H., Samad, S., Alrizq, M., Abosaq, H., & Alghamdi, A. (2023). The nexus between quality of customer relationship management systems and customers’ satisfaction: Evidence from online customers’ reviews. Heliyon, 9(11), e21828. https://doi.org/10.1016/j.heliyon.2023.e21828

Nofirda, F. A., & Susanto, P. (2024). Examining The Impact of Customer Satisfaction and Brand Image toward Consumer Loyalty on Bank Syariah Indonesia. Jurnal Manajemen Teknologi, 23(1), 38–47. https://doi.org/10.12695/JMT.2024.23.1.3

Novitasari, M., Amah, N., Ayera, A., Aziz, A. N., & Gunardi, A. (2024). SERVICE QUALITY AND CUSTOMER LOYALTY: THE ROLE OF SATISFACTION AND TRUST IN INDONESIAN SHARIA BANK. Jurnal Riset Bisnis Dan Manajemen, 17(1), 87–98. https://doi.org/10.23969/JRBM.V17I1.12659

Ozay, D., Jahanbakht, M., Shoomal, A., & Wang, S. (2024). Artificial Intelligence (AI)-based Customer Relationship Management (CRM): a comprehensive bibliometric and systematic literature review with outlook on future research. Enterprise Information Systems, 18(7), 2351869.

Ozili, P. K. (2023). The acceptable R-square in empirical modelling for social science research. In Social research methodology and publishing results: A guide to non-native English speakers (pp. 134–143). IGI global.

Prakoso, I. B., Sucipto, H., Indriyani, A., & Ikhwan, S. (2025). Pengaruh Kualitas Pelayanan, Fasilitas dan Ketersediaan Produk terhadap Kepuasan Pelanggan pada Perumda Air Minum Tirta Bahari Kota Tegal. JUMBIWIRA: Jurnal Manajemen Bisnis Kewirausahaan, 4(2), 676–695.

Prasatya, K. O., Putu, I., & Sukaatmadja, G. (2024). PERAN CUSTOMER SATISFACTION MEMEDIASI PENGARUH BRAND IMAGE DAN SERVICE QUALITY TERHADAP CUSTOMER LOYALTY. E-Jurnal Manajemen, 13(12), 1744–1755. https://doi.org/10.24843/EJMUNUD.2024.V13.I12.P04

Priadana dan Sunarsi. (2021). METODE PENELITIAN KUANTITATIF. Pascal Books.

Priskila, Pebrianti, W., & Heriyadi. (2025). The Influence Of Customer Relationship Management On Customer Satisfaction And Loyalty At Pusat Cantik, Pontianak City. Jurnal Multidisiplin, 1(4), 219–230. https://doi.org/10.70963/JM.V1I4.263

Prof. Dr. Umi Narimawati, Dra., S.E., M.Si., Jonathan Sarwono, S.Sos., M.Hum., Prof. Dr. H. Azhar Affandi, S.E., M.Sc., Prof. Dr. H.M. Sidik Priadana, M. S. (2020). Ragam Analisis dalam Metode Penelitian: untuk Penulisan Skripsi, Tesis, & Disertasi. Andi.

Purwanto, A., & Sudargini, Y. (2021). Partial least squares structural squation modeling (PLS-SEM) analysis for social and management research: a literature review. Journal of Industrial Engineering & Management Research, 2(4), 114–123.

Puspita, A. D., Jihadi, M., & Jihadi, P. A. D. (2023). The Effect of Service Quality on Fast Food Restaurant Customer Satisfaction: The Effect of Service Quality on Fast Food Restaurant Customer Satisfaction. Manajemen Bisnis, 13(01), 23–31. https://doi.org/10.22219/MB.V13I01.27457

Puspitarini, T., Jend Sudirman No, J., Semanggi, K., Setiabudi, K., Jakarta Selatan, K., & Khusus Ibukota, D. (2025). The Impact of Service Quality on Guest Satisfaction. Journal of Business and Economics Research (JBE), 6(1), 130–140. https://doi.org/10.47065/JBE.V6I1.6799

Raf, M., Syarif, A., Ekonomi Universitas Jambi, F., & Corresponding Author, I. (2020). Loyalty program and its influence on customer loyalty on mobile service with customer satisfaction as a mediating variable. Journal of Business Studies and Management Review, 3(2), 39–43. https://doi.org/10.22437/JBSMR.V3I2.9709

Ramdhan, M. (2021). Metode Penelitian. Cipta Media Nusantara.

Revilla, M., Saris, W. E., & Krosnick, J. A. (2022). Choosing the number of categories in agree–disagree scales. Journal of Survey Statistics and Methodology, 10(2), 189–205.

Riri, T., Sari, R. P., & Rusi, I. (2022). PENGUKURAN KUALITAS LAYANAN PADA APLIKASI MOBILE JKN MENGGUNAKAN METODE E-SERVICE QUALITY DAN MODEL KANO (Studi Kasus: Kantor BPJS Kesehataan Kota Pontianak). Coding: Jurnal Komputer Dan Aplikasi, 10(03), 344–353.

Roy, R. (2020). Where Will We Be in 2030? Moonshot Thinking For The Field of Performance Improvement: 10X in 10 Years? Performance Improvement, 59(5), 38–39. https://doi.org/10.1002/pfi.21914

Sari, K., Asri, H. R., Gisijanto, H. A., Kencana, A. P. P., & Ramadhan, I. C. (2023). Analysis of the Effect of Service Quality on Customer Loyalty and Satisfaction Using Expectation Confirmation Model and Servqual. JEMSI (Jurnal Ekonomi, Manajemen, Dan Akuntansi), 9(3), 812–817. https://doi.org/10.35870/JEMSI.V9I3.1193

Sarstedt, M., Ringle, C. M., & Hair, J. F. (2021). Partial least squares structural equation modeling. In Handbook of market research (pp. 587–632). Springer.

Setyaningrum, V. W., Marjam, ), Rahadhini, D., Sunarso, ), Program, ), Manajemen, S., Ekonomi, F., Slamet, U., & Surakarta, R. (2018). CUSTOMER RELATIONSHIP MANAGEMENT DALAM MEMBENTUK KEPUASAN PELANGGAN DAN LOYALITAS PELANGGAN. JURNAL EKONOMI DAN KEWIRAUSAHAAN, 18(2).

Shinta, K., Cahyani, D., Muljani, N., Katolik, U., & Surabaya, W. M. (2022). PENGARUH BRAND IMAGE, SERVICE QUALITY DAN PERCEIVED VALUE TERHADAP BRAND LOYALTY DENGAN CUSTOMER SATISFACTION SEBAGAI VARIABEL INTERVENING PADA GOJEK DI SURABAYA. Jurnal Ilmiah Mahasiswa Manajemen, 11(1), 78–89. https://doi.org/10.33508/JUMMA.V11I1.3884

Shrestha, N. (2020). Detecting multicollinearity in regression analysis. American Journal of Applied Mathematics and Statistics, 8(2), 39–42.

Sihombing, A. F., & Meitiana, M. (2024). The Customer Satisfaction Roles in Customer Satisfaction Affect the Quality of Service Customer Loyalty. JEMBA: Jurnal Ekonomi Pembangunan, Manajemen & Bisnis, Akuntansi, 4(1), 84–91. https://doi.org/10.52300/JEMBA.V4I1.15481

Situmeang, S., & Sugiyanto, S. (2024). The Effect of Service Quality, Customer Orientation and Customer Satisfaction on Customer Loyalty. International Journal of Economics (IJEC), 3(2), 1333–1344. https://doi.org/10.55299/IJEC.V3I2.1134

Sudarman, E., Madiistriyatno, H., & Sudarman, I. (2021). INVESTIGATIONS OF CUSTOMER LOYALTY: STRENGTHENING PRODUCT QUALITY, BRAND IMAGE AND CUSTOMER SATISFACTION. Jurnal Ilmiah Manajemen, 11(1), 78–93. https://doi.org/10.22441/mix.2021.v11i1.006

Sudiantini, D., & Saputra, F. (2022). The Influence of Leadership Style: Job Satisfaction, Employee Loyalty and Commitment at PT Lensa Potret Mandiri. Formosa Journal of Sustainable Research (FJSR), 1(3), 467–478.

Sugiat, M., Novrizon, E., & Trianasari, N. (2023). The Influence of Customer Relationship Management and Company Reputation on Customer Loyalty Through Customer Satisfaction in Telecommunication Companies. International Journal of Economics (IJEC), 2(2), 605–612. https://doi.org/10.55299/IJEC.V2I2.570

Sugiyono, L. (2020). Analisis Situasi Pembangunan Manusia di Jawa Tengah. Indonesian Journal of Applied Statistics, 3(1), 12. https://doi.org/10.13057/ijas.v3i1.39910

Sulaiman, S. M., Muhammad, M. A., Muhammad, A. D., & Sabiu, T. T. (2021). Mediating Role of Customer Satisfaction between Service Quality and Customer Loyalty with Non-Interest Bank in Nigeria. International Journal of Islamic Economics and Finance (IJIEF), 4(1), 1–30. https://doi.org/10.18196/IJIEF.V4I1.10424

Surahman, I. G. N., Yasa, P. N. S., & Wahyuni, N. M. (2020). The Effect of Service Quality on Customer Loyalty Mediated by Customer Satisfaction in Tourism Villages in Badung Regency. Jurnal Ekonomi Dan Bisnis Jagaditha, 7(1), 46–52. https://doi.org/10.22225/JJ.7.1.1626.46-52

Sustiyatik, E., & Jauhari, T. (2025). The Influence of Service Quality on Customer Loyalty with Satisfaction as a Mediating Variable. JURNAL APLIKASI PELAYARAN DAN KEPELABUHANAN, 15(2), 340–348. https://doi.org/10.30649/JAPK.V15I2.153

Suyanto, S., Rachbini, W., Wulandjani, H., Grashinta, A., & Rahmawati, E. (2024). Indonesian E-Commerce: Examining E-CRM, Browsing, Satisfaction and Loyalty. International Review of Management and Marketing, 14(6), 37–45. https://doi.org/10.32479/IRMM.17118

Tešić, D. (2020). Measuring dimensions of service quality. Strategic Management-International Journal of Strategic Management and Decision Support Systems in Strategic Management, 25(1).

Tirtayasa, S., Jufrizen, J., Pirari, W. S., & Sari, M. S. M. (2024). E-SATISFACTION AND E-LOYALTY: THE ROLE OF BRAND IMAGE AND E-SERVICE QUALITY. EKUITAS (Jurnal Ekonomi Dan Keuangan), 8(1), 1–26. https://doi.org/10.24034/J25485024.Y2024.V8.I1.5677

Toga Bimantaka, R., & Muthohar, M. (2023). The Effect of Service Quality, Brand Image, and Customer Satisfaction on Customer Loyalty on the Traveloka Application. Jurnal Economic Resource, 6(1), 214–220. https://doi.org/10.57178/JER.V6I1.649

Tsagris, M., & Pandis, N. (2021). Multicollinearity. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 159(5), 695–696. https://doi.org/10.1016/j.ajodo.2021.02.005

Usman, A. U., Sunusi, A., & Tukur, K. (2020). Numerical Analysis of Next-Generation Wireless Networks Using Modified PLS- SEM Model Numerical Analysis of Next-Generation Wireless Networks Using Modified PLS- SEM Model. January.

Utami, B., Hidayat, M. S., & Setyariningsih, E. (2023). The Relationship between Customer Satisfaction and Loyalty: A Systematic Literature Review. International Journal of Social Service and Research, 3(1), 54–62. https://doi.org/10.46799/IJSSR.V3I1.222

Violeta, L. G., & Farida, S. N. (2023). Pengaruh Brand Image dan Customer Experience Melalui Customer Satisfaction sebagai Variabel Intervening terhadap Customer Loyalty pada McDonald’s Rungkut di Surabaya. SEIKO: Journal of Management & Business, 6(1), 673–685.

Wahyudi, S. (2016). PERSEPSI, CUSTOMER RELATIONSHIP MANAGEMENT DAN LOYALITAS. JIANA ( Jurnal Ilmu Administrasi Negara ), 14(2), 59–64. https://doi.org/10.46730/JIANA.V14I2.3422

Wulandari, F., & Surianto, M. A. (2024). The Influence of Service Quality, Price and Delivery Accuracy on Customer Satisfaction at PT YZ. INNOVATION RESEARCH JOURNAL, 5(1), 51–58. https://doi.org/10.30587/INNOVATION.V5I1.7789

Yarsasi, S., Tahyudin, I., & Hariguna, T. (2025). Analisis Validitas dan Reliabilitas Kuesioner dengan Metode Partial Least Squares Structural Equation Modeling pada Aplikasi SMARTPLS. Jurnal Pendidikan Dan Teknologi Indonesia, 5(7), 1905–1913. https://doi.org/10.52436/1.JPTI.885

Yuliansyah, A., & Khadafi, R. (2023). The Influence of Trust, Customer Value and Customer Relationship Management (CRM) on Loyalty Through Customer Satisfaction of Republic of Indonesia Employee Cooperatives University of Jember. Indonesian Journal of Economic Management Sciences, 1(4), 577–596.

Zahro, T. S., & Miranti, T. (2024). THE INFLUENCE OF SERVICE QUALITY AND RELATIONSHIP QUALITY ON CUSTOMER LOYALTY THROUGH CUSTOMER SATISFACTION WITH GENDER AS A MODERATION VARIABLE. Jurnal Tabarru’: Islamic Banking and Finance, 7(1), 310–324. https://doi.org/10.25299/JTB.2024.VOL7(1).16341

Zaydan, F. (2024). The Influence of Mcdonald’s Application on Consumer Satisfaction and Purchasing Decisions among Students in Bandung City. International Journal Administration, Business & Organization, 5(3), 115–123.

Zhu, B., Kowatthanakul, S., & Satanasavapak, P. (2020). Generation Y consumer online repurchase intention in Bangkok: Based on Stimulus-Organism-Response (SOR) model. International Journal of Retail & Distribution Management, 48(1), 53–69.

Published

2026-01-15

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How to Cite

Maulana, I., Usman, O., & Fidhyallah, N. F. (2026). Pengaruh Customer Relationship Management, Service Quality, Dan Brand Image Terhadap Customer Loyalty Dengan Customer Satisfaction Sebagai Variabel Intervening : Studi Pada Pengguna Aplikasi MC`Donalds Di Jakarta. Jejak Digital: Jurnal Ilmiah Multidisiplin, 2(1), 1862-1887. https://doi.org/10.63822/sfxzs136