I. R. . Febriani and M. Amrullah, “Efforts of SMP Muhammadiyah 5 Reinforcement in Improving Learning Activities During the Covid-19 Pandemic: Upaya SMP Muhammadiyah 5 Tulangan dalam Meningkatkan Aktivitas Pembelajaran Selama Pandemi Covid-19”, icecrs, vol. 10, Oct. 2021.