Piriyachaiworkul, S., U. Jumrasphan, and T. Siripumyanun. “School-Based Educational Supervision Model under Primary Educational Service Area Office in the Northeast of Thailand”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, vol. 13, no. 1, July 2018, pp. 69-87, https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/190674.