Rafyansa Papunas, Orbanus Naharia, and Mariana Rengkuan. “Problem-Based Learning Model: An Effort To Improve Student Learning Outcomes In Class XI SMA Negeri 2 Tondano”. Konstanta : Jurnal Matematika dan Ilmu Pengetahuan Alam 1, no. 4 (October 6, 2023): 10–21. Accessed July 5, 2024. https://journal.widyakarya.ac.id/index.php/konstanta-widyakarya/article/view/1387.