MARTARINI, Lisma; ISWARA, Agus. Self-Directed Language Learning with Duolingo. Pubmedia Jurnal Pendidikan Bahasa Inggris, [S. l.], v. 2, n. 4, p. 7, 2025. DOI: 10.47134/jpbi.v2i4.1996. Disponível em: https://edu.pubmedia.id/index.php/jpbi/article/view/1996. Acesso em: 21 jul. 2026.