Yosa Novia Dewi. 2017. “IMPROVING STUDENTS’ GRAMMAR MASTER BY APPU SERIES FILM ON YOUTUBE (A Classroom Action Research DKV Faculty of Putra Indonesia University Padang)”. Jurnal Pendidikan Dompet Dhuafa 7 (02), 15-20. https://ojs.pendidikandd.org/index.php/JPD/article/view/109.