Konsangium, Sasiwimon, and Pimolpun Phetsombat. “PERSONAL ADMINISTRATION OF SCHOOL ADMINISTRATORS, NAKHONNAYOK PRIMARY EDUCATIONAL SERVICE AREA OFFICE”. Journal of MCU Nakhondhat 8, no. 5 (May 12, 2021): 205–216. Accessed October 1, 2022. https://so03.tci-thaijo.org/index.php/JMND/article/view/252228.