Yusuf, Muhammad Rahmani, and Hayatuddiniyah Hayatuddiniyah. “ANALISIS PERUBAHAN LAYANAN SIRKULASI PERPUSTAKAAN PERGURUAN TINGGI DI MASA PANDEMI CORONAVIRUS DISEASES 2019 (COVID-19) (Studi Kasus Di Perpustakaan UIN Sunan Kalijaga Yogyakarta)”. Publication Library and Information Science, vol. 4, no. 2, Feb. 2021, doi:10.24269/pls.v4i2.3121.