MARKEN, Marken. EFEKTIFITAS PEMBELAJARAN JARAK JAUH (PJJ) SELAMA PENDEMI COVID-19 DI SDN 21 SARANG BURUNG DANAU KABUPATEN SAMBAS KALIMANTAN BARAT. JURNAL PENDIDIKAN SAINS DAN APLIKASINYA, [S. l.], v. 3, n. 2, p. 59–65, 2020. DOI: 10.31571/jpsa.v3i2.2300. Disponível em: https://journal.ikippgriptk.ac.id/index.php/JPSA/article/view/2300. Acesso em: 2 may. 2024.