Muhtadi, Ali, Dian Wahyuningsih, and Monika Sidabutar. “The Effectiveness of Online Learning Model Implementation”. KnE Social Sciences 6, no. 2 (December 29, 2021): 505–520. Accessed April 19, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/10012.