Nakthong, M. ., & Kaewurai, W. . (2022). A DEVELOPMENT OF PROBLEM-BASED LEARNING ACTIVITY ON THE TOPIC OF ENVIRONMENT AND NATURAL RESOURCE TO ENCOURAGE ABILITY REFLECTIVE THINKING FOR MATTAYOMSUKSA 3 STUDENTS. Journal of Buddhist Education and Research, 8(1), 301–312. Retrieved from https://so06.tci-thaijo.org/index.php/jber/article/view/256982