SESA, Haris; MARGANA, Margana. Optimizing Whatsapp Features in Improving English Speaking Proficiency: A Classroom Action Research. Journal of Languages and Language Teaching, [S. l.], v. 13, n. 1, p. 414–424, 2025. DOI: 10.33394/jollt.v13i1.13347. Disponível em: https://e-journal3.undikma.ac.id/index.php/jollt/article/view/13347. Acesso em: 14 aug. 2025.