Muangthong, Natkamon, and Sirinapa Kijkuakul. 2025. “Learning Implementation Using Mathematical Task to Enhance Mathematical Reasoning Ability in Problem Solving in Three-Dimensional Geometry for The Grade 6 Students”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 19 (2):538-54. https://doi.org/10.14456/psruhss.2025.36.