Phongpanphaengpanga P. Variables Affecting the Servant Leadership of Educational Institute Administrators Under the Primary Educational Service Area Office. Hum. Behav. Dev. Soc. [internet]. 2019 May 15 [cited 2026 Sep. 22];18:121-8. available from: https://so01.tci-thaijo.org/index.php/hbds/article/view/189381