Srichum K, Niyamabha A. The Guidelines to Internal Supervision Process Development of School under The Angthong Primary Educational Service Area Office. jma [internet]. 2025 Jul. 31 [cited 2026 Aug. 28];12(2):543-58. available from: https://so04.tci-thaijo.org/index.php/JMA/article/view/281350