แสงสว่าง รัชนีกร. “A STUDY OF CORE COMPETENCY OF SCHOOL ADMINISTRATORS UNDER PATHUMTHANI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2”. Pathumthani University Academic Journal 13, no. 2 (December 29, 2021): 203–221. accessed September 28, 2026. https://so05.tci-thaijo.org/index.php/ptujournal/article/view/252314.