Syafrony, Andre. 2020. “A COMPARATIVE STUDY OF THE USE OF OPEN EDUCATIONAL RESOURCES (OER) AT E-LEARNING UNIVERSITY AND FACE-TO-FACE UNIVERSITY IN YOGYAKARTA (A CASE STUDY AT UT AND UNY)”. Jurnal Pendidikan Terbuka Dan Jarak Jauh 20 (2), 90-101. https://doi.org/10.33830/ptjj.v20i2.454.2019.