Muhammad Affan Surbakti, Zul Amry, and Mulyono. “Analysis of Conceptual Errors In Mathematical Solving Through Problem-Based Learning Model In Students”. Jurnal Perspektif 10, no. 1 (May 11, 2026): 223–236. Accessed May 12, 2026. http://perspektif.uinsgd.ac.id/index.php/JP/article/view/459.