Jongtaengklang S, Sod-ium P- on. 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. rtnb [internet]. 2023 Apr. 30 [cited 2025 Jun. 15];5(1):540-57. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/2705