Ramadhani, Putri, Yulyanti Harisman, Maulani Meutia Rani, Irwan, and Muhammad Mujtaba Asad. “The Effect of Implementing the Problem-Based Learning Model on the Systematic Communication Skills of Grade XI Students at SMAN 2 Padang”. Rangkiang Mathematics Journal 5, no. 2 (October 31, 2026): 172–179. Accessed November 5, 2026. https://math.ppj.unp.ac.id/index.php/RMJ/article/view/175.