Chanmanee, Panudet, Kritkanok Duangchatom, and Darunnapa Nachairit. 2026. “GUIDELINES FOR DEVELOPING 21ST-CENTURY SKILLS OF SCHOOL ADMINISTRATOR UNDER THE OFFICE OF KHON KAEN SECONDARY EDUCATIONAL SERVICE AREA OFFICE”. MBU Roi Et Journal of Global Education Review 6 (2):84-96. https://so19.tci-thaijo.org/index.php/RJGE/article/view/3823.