BOONMEE, W. .; THAMMASIT, P. ADMINISTRATIVE SKILLS IN THE 21ST CENTURY OF SCHOOL ADMINISTRATORS IN UTTARADIT SECONDARY SCHOOLS. Journal of MCU Nakhondhat, Nakhon Si Thammarat, Thailand, v. 7, n. 5, p. 172–182, 2020. Disponível em: https://so03.tci-thaijo.org/index.php/JMND/article/view/243395. Acesso em: 3 may. 2024.