Srijandee, Thadsaporn. “THE DEVELOPMENT OF MATHEMATICS LEARNING ACTIVITIES ON LINEAR EQUATION BASED ON CONSTRUCTIVIST THEORY SUPPLEMENTED BY POYA’S PROBLEM SOLVING PRACTICE FOR MATHAYOMSUKSA 1 STUDENTS”. Journal of MCU Nakhondhat 9, no. 9 (September 30, 2022): 328–338. Accessed May 17, 2024. https://so03.tci-thaijo.org/index.php/JMND/article/view/263910.