แสงสว่าง ร. “A STUDY OF CORE COMPETENCY OF SCHOOL ADMINISTRATORS UNDER PATHUMTHANI PRIMARY EDUCATIONAL SERVICE AREA OFFICE 2”. Pathumthani University Academic Journal, vol. 13, no. 2, Dec. 2021, pp. 203-21, https://so05.tci-thaijo.org/index.php/ptujournal/article/view/252314.