Ajeng Julia, Erna Suwangsih, and Puji Rahayu. “The Influence of Problem Based Learning (PBL) Model on Students’ Mathematical Problem Solving Ability in Elementary Schools”. Regulate: Jurnal Ilmu Pendidikan, Hukum dan Bisnis 2, no. 1 (February 13, 2025): 1–12. Accessed November 1, 2025. https://regulate.hellowpustaka.id/index.php/i/article/view/15.