Promkong , Aongart, and Theeraphong Kaenin. “ACADEMIC AFFAIRS EFFICIENCIES OF SCHOOLS UNDER NAKHON SI THAMMARAT PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2”. Journal of MCU Nakhondhat 10, no. 7 (July 23, 2023): 226–236. accessed December 9, 2025. https://so03.tci-thaijo.org/index.php/JMND/article/view/270746.