Vongyai, Attakan, and Tipparat Noparit. “USING HEURISTIC STRATEGIES TO PROMOTE MATHEMATICS PROBLEM SOLVING ABILITY OF GRADE 10 STUDENTS”. PEOPLE: International Journal of Social Sciences 5, no. 1 (July 4, 2019): 952–968. Accessed November 10, 2024. https://mail.grdspublishing.org/index.php/people/article/view/870.