“The Impact of Covid-19 on the Implementation of Online Learning at SDN Jenggot for the 2020 Academic Year”. 2022. Buana Pendidikan: Jurnal Fakultas Keguruan Dan Ilmu Pendidikan Unipa Surabaya 18 (1): 135-42. https://doi.org/10.36456/bp.vol18.no1.a5240.