RIZKI NURHIDAYAH SITOMPUL. Duolingo in Basic English Learning: Student Engagement and Achievement. Jurnal Pendidikan dan Sastra Inggris, [S. l.], v. 5, n. 3, p. 563–569, 2025. DOI: 10.55606/jupensi.v5i3.6321. Disponível em: https://www.journalshub.org/index.php/JUPENSI/article/view/6321. Acesso em: 30 dec. 2025.