Simbolon, Jimmy Francius. “PELAKSANAAN PEMBELAJARAN JARAK JAUH (PJJ) DI TENGAH PANDEMI COVID- 19 PADA MATA PELAJARAN BIOLOGI KELAS X SMA NEGERI 2 MEDAN TP. 2020/2021”. Jurnal Ilmiah Aquinas 4, no. 1 (January 25, 2021): 91–97. Accessed July 22, 2024. https://ejournal.ust.ac.id/index.php/Aquinas/article/view/991.