Sribang S, Promta U- rasa. The Development Guidelines of Servant Leadership for Administrators Under Surin Primary Educational Service Area Office 1. JITI [internet]. 2022 Jun. 29 [cited 2026 Sep. 11];20(2):63-79. available from: https://so03.tci-thaijo.org/index.php/oarit/article/view/262650