Hongsaipin, N., and P. . Visitthapanyo. “Spiritual Leadership of School Administrators with the Development of Professional Ethics”. Journal of Graduate MCU KhonKaen Campus, vol. 12, no. 1, Mar. 2025, pp. 488-00, https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/273172.