Kaewkam W, Siritharo P. Administrative Factors Affecting Effectiveness of Schools under Secondary Educational Service Area Office Loei Nongbualamphu: Administrative Factors Affecting Effectiveness of Schools under Secondary Educational Service Area Office Loei Nongbualamphu. rtnb [internet]. 2023 Aug. 31 [cited 2025 Apr. 14];5(2):464-81. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/3052