SYAFRONY, A. 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, v. 20, n. 2, p. 90-101, 31 Jan. 2020.