HELMI, Silfia. Politeness Strategies Found in Classroom Interaction Post-Graduate Student. Modality Journal: International Journal of Linguistics and Literature, [S. l.], v. 2, n. 1, p. 16–26, 2022. DOI: 10.30983/mj.v2i1.5602. Disponível em: https://ejournal.uinbukittinggi.ac.id/index.php/modality/article/view/5602. Acesso em: 16 mar. 2026.