Sitthiwongsa, Thidalak, and Chumnian Poollaharn. “The Effectiveness of the Guidelines for Educational Management Based-on Sufficiency Economy Philosophy of the Learner Development Activities in Schools Under Mahasarakham Primary Education Service Area Office 3”. Journal of Education Rajabhat Maha Sarakham University 20, no. 3 (December 31, 2023): 32–43. Accessed May 17, 2024. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/260048.