Sichiangha , A., Soijit , P., & Chansaengkrachang, K. (2021). DEVELOPMENT OF LEARNING ACTIVITIES FOR MATHEMATICAL PROBLEM-SOLVING THROUGH GEOGEBRA PROGRAM WITH PLOBLEM-BASED LEARNING ACTIVITIES. Journal of MCU Nakhondhat, 8(8), 31–42. Retrieved from https://so03.tci-thaijo.org/index.php/JMND/article/view/254263