Sonnonthee S, Uppamaiathichai T. Guidelines for Internal Supervision in Educational Institution Under the Phitsanulok Provincial Administrative Organization. jg-mcukk [internet]. 2025 Dec. 30 [cited 2026 Sep. 1];12(4):382-95. available from: https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/278100