., Mariati; AZWAD FAUZAN, A. Optimization of English Speaking Skill and English Grammatical Competence of Second Semester College Students in English Literature of Bung Hatta University Through Role-play Technique: Classroom Action Research of English As Foreign Language. KnE Social Sciences, [S. l.], v. 3, n. 14, p. 402–417, 2019. DOI: 10.18502/kss.v3i14.4326. Disponível em: https://knepublishing.com/index.php/KnE-Social/article/view/4326. Acesso em: 11 jul. 2025.