Ridlo, Muhammad, Kerisman Halawa, and Sarah Harefa. “Peranan Perpustakaan Perguruan Tinggi Dalam Mencegah Penyebaran Covid 19”. Jurnal Tadwin 1, no. 1 (July 1, 2020): 58-73. Accessed October 24, 2020. http://jurnal.radenfatah.ac.id/index.php/tadwin/article/view/5801.