แสนสุข จ. STRTEGY LEADERSHIP MODEL OF SCHOOL ADMINISTRATORS UNDER THE JURISDICTION OF SECONDARY EDUCATIONAL SERVICE AREA OFFICE 15. ptujournal [Internet]. 2021 Jun. 30 [cited 2024 May 3];13(1):54-71. Available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/249028