romsri , Chanakan, and Juntima Romsri. 2021. “Problems in Learning Management and Administration According to the Sufficiency Economy Philosophy of Educational Institutions under Roi-Et Primary Educational Service Area Office 1”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 8 (2):155-68. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/251215.