Farha, A., N. Khusnah, and P. Nugroho. “Problematika Pembelajaran Berbasis Online Pada Lembaga Pendidikan Nonformal Era Pandemi Covid-19 (Studi Kasus Di Madrasah Diniyah Manbaul Huda)”. Fitrah: Journal of Islamic Education, vol. 1, no. 2, Feb. 2021, pp. 261-72, https://jurnal.staisumatera-medan.ac.id/index.php/fitrah/article/view/38.