Octavia, Sherly Christina, et al. “Analysis of Obstacles on Limited Face-To-Face Learning During The Covid-19 Pandemic Junior High School In Medan”. Tarbiyah : Jurnal Ilmiah Kependidikan, vol. 11, no. 1, July 2022, pp. 18-28, doi:10.18592/tarbiyah.v11i1.6412.