admin, admin, and Agus Wardhono. 2017. “AN ANALYSIS ON POLITENESS IN SMS OF THE STUDENTS TO THE LECTURERS OF ENGLISH DEPARTMENT UNIROW TUBAN”. DIDAKTIKA : Jurnal Pemikiran Pendidikan 19 (2):71-80. https://journal.umg.ac.id/index.php/didaktika/article/view/45.