Prakobnun, Wongsagon, Kritkanok Duangchatom, and Chayakan Ruangsuwan. “Development Model for Characteristics of 21st Century School Administrators in School Under the Secondary Educational Service Area Office Roi-et”. Journal of Modern Learning Development 8, no. 9 (September 30, 2023): 35–54. accessed October 10, 2026. https://so06.tci-thaijo.org/index.php/jomld/article/view/262298.