Arindawan D, Subagiyo L, Palenewen E. The EFFECTIVENESS OF ONLINE OFFLINE LEARNING MEDIA (MO2) BASED ON SMARTPHONE. IJER [Internet]. 2021Jul.5 [cited 2024Apr.26];8(1):15-2. Available from: https://journal.unj.ac.id/unj/index.php/ijer/article/view/23250