Bukit, Nurdin, and Satria Mihardi. “THE EFFECT OF LEARNING PHYSICS WITH PROBLEM BASED INSTRUCTION (PBI) MODELS IN PHYSICS AT THE CLASSROOM”. Jurnal Pendidikan Fisika 1, no. 1 (June 1, 2012): 1–8. Accessed July 5, 2025. https://jurnal.unimed.ac.id/2012/index.php/jpf/article/view/3374.