Chinporn P, Phoojomjit P. The Guidelines for Development of Servant Leadership of School Administrators Under The Secondary Educational Service Area Office Nakhon Ratchasima: The Guidelines for Development of Servant Leadership of School Administrators Under The Secondary Educational Service Area Office Nakhon Ratchasima. rtnb [internet]. 2023 Aug. 31 [cited 2025 May 31];5(2):449-63. available from: https://so07.tci-thaijo.org/index.php/rtnb/article/view/3196