Tongyang V, Vorapanya S, Phayom C. THE INTERNAL SUPERVISION OF THE SCHOOL ADMINISTRATORS UNDER SARABURI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1. Education MCU [internet]. 2025 May 1 [cited 2026 Sep. 1];12(1):158-75. available from: https://so02.tci-thaijo.org/index.php/EDMCU/article/view/277149