Klinchai, Y. ., Chanchaiy Poolsuk, P. ., & Phramangsang, N. . (2022). The 21St Century Ethical Leadership Development Model of School Administrators Under the Kamphaeng Phet Elementary Education Service Area Office. Journal of Graduate Research, 13(1), 123–137. Retrieved from https://so02.tci-thaijo.org/index.php/banditvijai/article/view/251278