HASIBUAN, Sri Wahyuni. STUDI KEGAGALAN INSTRUKSI KELAS DI KURSUS BAHASA INGGRIS ESSENTIAL MEDAN. MAKRIFAT, [S. l.], v. 4, n. 1, p. 52–63, 2020. Disponível em: https://journal.staidarularafah.ac.id/index.php/JURNALMAKRIFAT/article/view/47. Acesso em: 26 dec. 2025.