PASARIBU, N. A. M. Contribution of Mastery of Sociolinguistic Concepts to Pragmatic Skills by Students of Free Mathodist 1 Private Junior High School Medan 2012/2013 Academic Year. International Journal of Basic and Applied Science, [S. l.], v. 10, n. 4, p. 145–153, 2022. DOI: 10.35335/ijobas.v10i4.70. Disponível em: https://www.ijobas.pelnus.ac.id/index.php/ijobas/article/view/70. Acesso em: 10 jun. 2026.