Srijan, Jintanaporn, and Sunthon Kohtbantau2. 2022. “Educational Institutions Administration According to the Philosophy of Sufficiency Economy of School Administrators in Warin Academic Group under the Jurisdiction of Ubon Ratchathani- Amnat Charoen Secondary Education Service Area Office”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 9 (3):95-106. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/256532.