Saikham S, Sangnont K. DEVELOPMENT OF TRANSFORMATIONAL LEADERSHIP BASED ON IV BHÃVANÃ PRINCIPLES OF SCHOOL ADMINISTRATORS UNDER THE OFFICE OF PATHUM THANI PRIMARY EDUCATIONAL SERVICE AREA 1. JBER [internet]. 2022 Apr. 30 [cited 2025 Dec. 10];8(1):324-3. available from: https://so06.tci-thaijo.org/index.php/jber/article/view/257035