Rafyansa Papunas, Orbanus Naharia, Mariana Rengkuan. Problem-Based Learning Model: An Effort To Improve Student Learning Outcomes In Class XI SMA Negeri 2 Tondano. Konstanta [Internet]. 2023 Oct. 6 [cited 2024 Nov. 24];1(4):10-21. Available from: https://ifrelresearch.org/index.php/konstanta-widyakarya/article/view/1387