SIAHAAN, Desta Gloria; NAHAK, Maria Hendrika Kristen Indi; BOUK, Edmundus. Duolingo Application as A Mean to Deepen Understanding of English Vocabulary by Students of English Educational Department Timor University. Buletin Poltanesa, [S. l.], v. 25, n. 2, p. 208–216, 2024. DOI: 10.51967/tanesa.v25i2.3189. Disponível em: https://e-journal.politanisamarinda.ac.id/index.php/tanesa/article/view/3189. Acesso em: 6 jan. 2025.