Pongnarin Maowtub, Saiphin Siharak. “The Learning Management of Project Based Learning Along With Questioning Based on Sufficiency Economy Philosophy to Enhance Project Proceeding Ability and Thinking - Practicing Process for Secondary 3 (Grade 9) Students”. International Journal of Advanced Science and Technology 29, no. 4s (June 6, 2020): 3516-3520. Accessed October 6, 2022. http://sersc.org/journals/index.php/IJAST/article/view/23497.