Yusuf, M.R. and Hayatuddiniyah, H. 2021. 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. 4, 2 (Feb. 2021). DOI:https://doi.org/10.24269/pls.v4i2.3121.