Uraiwan Praimee, and Wannasakphijit Boonserm. “The Effects of Learning Activities on Waste and Sewage Management Using Question and Problems-Based Learning for Undergraduate Students of Mahasarakham University, Thailand”. Journal of Educational Issues 7, no. 1 (June 19, 2024): pp. 72–91. Accessed October 5, 2024. https://macrojournal.org/index.php/jei/article/view/1895.