Wongnok ป. THE GUIDELINES FOR DEVELOPING TRANSFORMATIONAL LEADERSHIP OF SCHOOL ADMINISTRATORS SECONDARY EDUCATION IN THE THAILAND 4.0 ERA UNDER THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE LOEI NONG BUA LAMPHU. Integr. Soc. Sci. J. [Internet]. 2023 Dec. 31 [cited 2026 Nov. 10];3(9):57-72. Available from: https://ojs.mbuslc.ac.th/index.php/issj/article/view/236