Saiboot S, Noirid S. The Development of Program to Enhance Teacher’s Competency on Teacher Leadership for School in the Secondary Educational Service Area Office 33. AJMBU [internet]. 2020 May 5 [cited 2026 Sep. 20];10(1):383-94. available from: https://so01.tci-thaijo.org/index.php/AJMBU/article/view/240571