PRADIRA ARITONANG, Robbi; MARAKALI SIREGAR, Onan; ADLINA, Hafiza. Pengaruh Strategi Event Marketing dan Direct Marketing PT Cyberindo Aditama dalam Meningkatkan Customer Loyalty di Kota Medan. Jejak digital: Jurnal Ilmiah Multidisiplin, [S. l.], v. 2, n. 2, p. 3025–3032, 2026. DOI: 10.63822/rg1yt412. Disponível em: https://indojurnal.com/index.php/jejakdigital/article/view/2355. Acesso em: 25 feb. 2026.