Istianingrum A, Karnawati RA. Efektivitas Virtual Classroom dan Flip the Teacher dalam Flipped Classroom pada Chuukyuu Bunpou. jjlel [Internet]. 2020Aug.22 [cited 2025Apr.30];4(2):115-31. Available from: https://journal.umy.ac.id/index.php/jjlel/article/view/8758