Simatupang, Mulyanto, Ajisman, and Roimarthen Saputra Hamonangan Nasution. “Improving Student Learning Outcomes by Using the Problem Based Learning Method in Islamic Education Learning at SMA Negeri 2 Sibolga”. Jurnal Pendidikan Profesi Guru 1, no. 2 (July 31, 2023): 16–22. Accessed February 23, 2025. https://journal.ar-raniry.ac.id/ppg/article/view/6696.