Promtongboon, P., and P. Luangrangsee. “THE DEVELOPMENT OF MATHEMATICS TEACHING WHICH INCLUDES PROBLEM SOLVING MULTIPLICATION AND DIVISION USING THE BAR MODEL THEORY FOR PRATHOMSUKSA 4 STUDENTS PATONGWITTAYAMULNITHI SCHOOL”. Journal of Social Science and Cultural, vol. 8, no. 3, Mar. 2024, pp. 25-37, https://so06.tci-thaijo.org/index.php/JSC/article/view/271579.