Cahyono, Cahyono, Dadang Mulyana, Lili Sukarliana, and Desi Puspitasari. “Analisis Implementasi Model Pembelajaran Problem Based Learning Dalam Menumbuhkan Keterampilan Mengemukakan Pendapat Pada Proses Pembelajaran : Analysis of the Problem Based Learning Models Implementation in Developing Express Opinion Skills on the Learning Process. ”. Jurnal Ilmiah Mimbar Demokrasi 21, no. 2 (April 19, 2022): 87–92. Accessed January 21, 2025. https://journal.unj.ac.id/unj/index.php/jmb/article/view/25855.