Nurmayuni, Samidah. “Layanan Online Perpustakaan Perguruan Tinggi Sebelum Dan Sesudah Pandemi Covid-19: Studi Perpustakaan UIN Sunan Ampel Sejak 2018 Hingga 2020”. IJAL (Indonesian Journal of Academic Librarianship) 4, no. 1 (October 30, 2020): 23–40. Accessed November 5, 2025. http://journals.apptisjatim.org/index.php/ijal/article/view/85.