คล่องขยัน ศุภชัย. “Establish the Research Problem Framework and Topic by Using the Scientific Theory”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 3, no. 3 (December 31, 2016): 44–54. Accessed May 5, 2024. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/211939.