The Impact of Teacher Training on Student Achievement in English Teaching-Learning at SMA S Nupela. Kopula: Jurnal Bahasa, Sastra, dan Pendidikan, [S. l.], v. 7, n. 1, p. 219–225, 2025. DOI: 10.29303/kopula.v7i1.6292. Disponível em: https://jurnal.unram.ac.id/index.php/kopula/article/view/6292. Acesso em: 28 okt. 2025.