ชูศักดิ์ พ. and กองทิพย์ ญ. (2018) “A STUDY OF MATHEMATICAL PROBLEM-SOLVING ABILITY IN INEQUALITY FOR MATHAYOMSUKSA III STUDENTS VIA PROBLEM POSING ACTIVITIES”, Journal of Industrial Education, 17(2), pp. 75–82. Available at: https://ph01.tci-thaijo.org/index.php/JIE/article/view/123859 (Accessed: 17 April 2024).