Khumphen, Warissara, and Surachai Sikkabandit. 2019. “The Transformational Leadership of Personnel Affecting Organization of Schools under the Secondary Educational Service Area Office 2 Bangkok Metropolis”. Rajapark Journal 13 (28). Bangkok, Thailand:10-19. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/171252.