แก้วปฎิมา ธ. “TRANSFORMATIVE LEADERSHIP OF EDUCATIONAL INSTITUTION ADMINISTRATORS AFFECTING SCHOOL ADMINISTRATION EFFECTIVENESS IN NON-FORMAL AND FORMAL EDUCATION OFFICE, SONGKHLA PROVINCE”. Pathumthani University Academic Journal, vol. 13, no. 1, June 2021, pp. 442-58, https://so05.tci-thaijo.org/index.php/ptujournal/article/view/249059.