Siregar, Hilman Sujaah, and Citra Anggia Putri. “POLITENESS STRATEGY IN REQUEST USED IN MANDAILING WEDDING CEREMONY”. TRANSFORM : Journal of English Language Teaching and Learning 9, no. 1 (January 30, 2020). Accessed August 4, 2025. https://jurnal.unimed.ac.id/2012/index.php/jelt/article/view/29542.