Jongtaengklang, S., and P.- on Sod-ium. “Factor Analysis of Ethical Leadership of School Administrators under Secondary Educational Service Area Office Loei Nong Bua Lamphu: Factor Analysis of Ethical Leadership of School Administrators under Secondary Educational Service Area Office Loei Nong Bua Lamphu”. RATANABUTH JOURNAL, vol. 5, no. 1, Apr. 2023, pp. 540-57, https://so07.tci-thaijo.org/index.php/rtnb/article/view/2705.