patta, supapornpatta, Chueasathuchon, C., & Chueasathuchon, C. (2019). Some Variables Related to Mathematics Problem-Solving Ability of the Sixth Grade Students in the Schools under the Office of Amnatcharoen Primary Educational Service Area. Ubon Ratchathani Journal of Research and Evaluation, 8(2), 145–156. Retrieved from https://so06.tci-thaijo.org/index.php/ubonreseva/article/view/197267