Mularsih, Evi Riski, and Ainurvely G Maudy. “STUDENTS’ PERCEPTION OF POLITENESS IN COMMUNICATING WITH TEACHERS THROUGH INSTANT MESSAGING APPLICATION:A NARRATIVE INQUIRY”. Surakarta English and Literature Journal, vol. 3, no. 1, Feb. 2020, pp. 37-44, https://ejurnal.unsa.ac.id/index.php/selju/article/view/120.