แสงเพ็ชร อ. ACADEMIC ADMINISTRATION GUIDELINES OF SCHOOL ADMINISTRATORS UNDER THE OFFICE OF SECONDARY EDUCATIONAL SERVICE AREA 7. ptujournal [Internet]. 2020 Jun. 25 [cited 2024 May 3];12(1):186-98. Available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/238801