Yuniari NM. THE EFFECT OF USING POWTOON AUDIOVISUAL MEDIA UPON THE STUDENTS’ WRITING ACHIEVEMENT OF THE THIRD SEMESTER STUDENTS OF ENGLISH EDUCATION DEPARTMENT FACULTY OF TEACHER TRAINING AND PEDAGOGY DWIJENDRA UNIVERSITY. WA [Internet]. 2018Oct.31 [cited 2024Dec.22];9(2). Available from: http://43.243.142.146/index.php/widyaaccarya/article/view/668