Thammawong , Nittayaporn, Pongsak Thongpanchang, Udomphan Pitchprasert, and Pimon Wisetsang. “Administrative Skills in the 21st Century of the Basic School Administrators in the Schools under the Secondary Educational Service Area Office, Si Sa Ket- Yasothon”. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University 17, no. 2 (August 27, 2022): 31–41. Accessed April 25, 2024. https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/252246.