yi, chen, Peerapong Tipanark, and Pornthep Muanman. 2024. “Developping 21st Century Leadership Skills Indicators for School Administrators in Anshan Normal”. Nimitmai Review Journal 7 (1). Phayao, Thailand:93-107. https://so04.tci-thaijo.org/index.php/nmrj/article/view/263317.