แก้วปฎิมา ธ. TRANSFORMATIVE LEADERSHIP OF EDUCATIONAL INSTITUTION ADMINISTRATORS AFFECTING SCHOOL ADMINISTRATION EFFECTIVENESS IN NON-FORMAL AND FORMAL EDUCATION OFFICE, SONGKHLA PROVINCE. ptujournal [internet]. 2021 Jun. 30 [cited 2026 Sep. 26];13(1):442-58. available from: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/249059