Phoseng , Panadda, Worrakrit Thuenchang, and Thanong Thosagai. “THE DEVELOPMENT OF SCHOOL ADMINISTRATORS’ SKILLS IN THE 21ST-CENTURY BASED ON THE THREEFOLD TRAINING IN SCHOOLS UNDER THE PHETCHABUN PRIMARY EDUCATIONAL SERVICE AREA OFFICE 3”. Journal of Educational Review Faculty of Education in MCU 13, no. 2 (September 1, 2026): 184–195. accessed September 16, 2026. https://so02.tci-thaijo.org/index.php/EDMCU/article/view/289115.