ROHIMAH, N. K.; MULYADI, D.; BUDIASTUTI, R. E. Developing Mobile Learning Media in Teaching Passive Voice. English Focus: Journal of English Language Education, [S. l.], v. 5, n. 1, p. 42–61, 2021. DOI: 10.24905/efj.v5i1.126. Disponível em: https://englishfocus.upstegal.ac.id/index.php/efj/article/view/126. Acesso em: 19 apr. 2025.