Using Busuu App to Learn Vocabulary For 7th-Grade of SMP Istafad. English Education:Journal of English Teaching and Research, [S. l.], v. 9, n. 1, p. 49–60, 2024. DOI: 10.29407/jetar.v9i1.21283. Disponível em: https://ojs.unpkediri.ac.id/index.php/inggris/article/view/21283. Acesso em: 14 mar. 2025.