Nopita Sari Gultom. “DEVELOPMENT OF PROBLEM BASED LEARNING MODEL TO IMPROVE STUDENTS’ PROBLEM SOLVING ABILITIES”. Jurnal Profesionalisme Guru 2, no. 1 (May 30, 2025): 32–40. Accessed September 28, 2025. https://journal.maalahliyah.sch.id/index.php/jpg/article/view/437.