Mueangphong, S., P. Tiangpak, and S. Tienkhaw. “Administrative skills of School Administrators in the 21th Century Influencing School Effectiveness under the Nongbualamphu Primary Educational Area 2”. Journal of Humanities and Social Sciences, Rajapruk University, vol. 11, no. 1, Apr. 2025, pp. 107-23, https://so03.tci-thaijo.org/index.php/rpu/article/view/288761.