Simanjuntak, Harlen. “Analisis Hambatan Pelaksanaan Pembelajaran Online Di SDN 065854 Medan Helvetia Serta Solusinya”. Jurnal Dirosah Islamiyah 3, no. 3 (July 25, 2021): 313-319. Accessed November 15, 2024. https://journal.laaroiba.com/index.php/jdi/article/view/436.