Sutthiprapa S, Hoksuwan S. DEVELOPING A PROGRAM TO STRENGTHEN INNOVATIVE LEADERSHIP OF SCHOOL ADMINISTRATORS UNDER THE ROI-ET PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1. RJGE [internet]. 2026 Aug. 31 [cited 2026 Sep. 12];6(2):1-15. available from: https://so19.tci-thaijo.org/index.php/RJGE/article/view/3817