Saenbunruang กำพล, Pollaharn จำเนียร, and Duangchatom กฤษกนก. “The Development of Sufficiency School Administration Management Model Secondary Educational Service Area Office 27”. Journal of Education Rajabhat Maha Sarakham University 18, no. 1 (January 20, 2021): 47–60. Accessed January 28, 2022. https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/251561.