Mufliharsi, Risa, and Heppy Atma Pratiwi. “POLITENESS PRINCIPLE: PRESIDENT JOKO WIDODO’S SPEECH ACT IN VIDEO BLOG”. Bahtera: Jurnal Pendidikan Bahasa dan Sastra 18, no. 1 (January 1, 2019): 79-92. Accessed April 20, 2024. https://journal.unj.ac.id/unj/index.php/bahtera/article/view/9685.