Transformational Leadership of Administrators Influencing Affecting School Effectiveness under the Office of Samutprakan Primary Education Service Area Office 2. BMV [Internet]. 2026 May 31 [cited 2026 Jun. 13];3(1):286-305. Available from: https://benjamit.thonburi-u.ac.th/ojs/index.php/bmv16/article/view/503