“KEEFEKTIFAN ICE BREAKING DAN PROBLEM BASED LEARNING DALAM PEMBELAJARAN DIKELAS”. UTILITY: Jurnal Ilmiah Pendidikan dan Ekonomi 3, no. 2 (August 16, 2019): 67–74. Accessed June 4, 2026. https://journal.unuha.ac.id/index.php/utility/article/view/621.