Srisingha K, Indusuta K. THE RELATIONSHIP BETWEEN STRATEGIC LEADERSHIP OF SCHOOL ADMINISTRATORS AND EFFECTIVENESS OF SCHOOLS UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE BANGKOK 2. JEI [internet]. 2025 Sep. 30 [cited 2026 Sep. 28];27(3):29-40. available from: https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/279739