Khongnawung, Saengdown, and Manoonpong Chaiyaphan. 2024. “The Promoting on Personnel Development of School under the Jurisdiction of Chaiyaphum Primary Educational Service Area Office 2”. Journal of Graduate Saket Review 9 (2):214-25. https://so03.tci-thaijo.org/index.php/saketreview/article/view/279540.