Sipayung, R., Sihotang, D.O. and Lumban Batu, J.S. 2021. PERSEPSI GURU TERHADAP EFEKTIVITAS PEMBELAJARAN ONLINE DI MASA PANDEMI COVID-19. Jurnal Ilmiah Aquinas. 4, 2 (Jul. 2021), 311–321. DOI:https://doi.org/10.54367/aquinas.v4i2.1307.