Suryanto, Adi, Abdul Gafur, and FX. Sudarsono. “MODEL EVALUASI PROGRAM TUTORIAL TATAP MUKA UNIVERSITAS TERBUKA”. Jurnal Penelitian dan Evaluasi Pendidikan 17, no. 2 (December 15, 2013): 198–214. Accessed November 10, 2025. http://journal.uny.ac.id/index.php/jpep/article/view/1695.