Canggung Darong, Hieronimus, A. Effendi Kadarisman, and Yazid Basthomi. “Teachers’ Politeness Markers in Request in Classroom Interactions”. NOBEL: Journal of Literature and Language Teaching 11, no. 2 (September 30, 2020): 217-233. Accessed January 27, 2022. http://jurnalfahum.uinsby.ac.id/index.php/nobel/article/view/299.