Agsornwet, I. ., S. . Kenaphoom, and S. . Kosonkittiumporn. “Model for Competency Development of Administrators of Provincial Offices and Branches in the Central Northeastern Region”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 9, no. 3, Dec. 2022, pp. 555-72, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/256430.