Uli Lumbanraja, Hana Maria, and Nurtanio Agus Purwanto. “The Implementation of Online Learning in Elementary Schools During the COVID-19 Pandemic”. KnE Social Sciences 6, no. 2 (December 29, 2021): 195–211. Accessed May 5, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/9989.