Simatupang M, Ajisman, Nasution RSH. Improving Student Learning Outcomes by Using the Problem Based Learning Method in Islamic Education Learning at SMA Negeri 2 Sibolga. jppg [Internet]. 2023 Jul. 31 [cited 2025 Feb. 23];1(2):16-22. Available from: https://journal.ar-raniry.ac.id/ppg/article/view/6696