Syafrony, A. (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), 68–79. https://doi.org/10.33830/ptjj.v20i2.454.2019