Yoodee P, Yamchuti U, Intarasompun W. Management Skills in the 21st Century of School Administrators Affecting the Effectiveness of Schools under the Secondary Educational Service Area Office Bangkok 1. IARJ [internet]. 2025 Nov. 23 [cited 2026 Sep. 24];5(6):621-34. available from: https://so03.tci-thaijo.org/index.php/IARJ/article/view/287063