Pasaribu, Nur Ayni 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 10, no. 4 (March 30, 2022): 145–153. Accessed May 28, 2026. https://ijobas.pelnus.ac.id/index.php/ijobas/article/view/70.