HABIB ANUGERAH ALKARIM; ANGELA SURYA GINTING; DONA AISYAH SITORUS; NAYLATUL FADHILAH GINTING; MUNAWARAH BR. LIMBONG; DEASY YUNITA SIREGAR. Understanding Formal and Informal English: A Literature Review. Jejak digital: Jurnal Ilmiah Multidisiplin, [S. l.], v. 2, n. 1, p. 1257–1262, 2025. DOI: 10.63822/zx384669. Disponível em: https://indojurnal.com/index.php/jejakdigital/article/view/1850. Acesso em: 17 jan. 2026.