Pho-ong N, Metheevachatra A, Uttaro PU. Transformational Leadership Based in Sanghahavttu 4 of School Administrators in Extended Opporyunity Schools Under The Nakhon Sawan Primary Educational Service Area Office 1: -. jma [internet]. 2026 Aug. 15 [cited 2026 Aug. 27];13(2):249-73. available from: https://so04.tci-thaijo.org/index.php/JMA/article/view/289512