Nakthong, Minra, and Wareerat Kaewurai. 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):301-12. https://so06.tci-thaijo.org/index.php/jber/article/view/256982.