Sugun, Paveena, and Khemmanat Pookongchai. 2021. “The Development of Core Competency of the Personnel of the Subdistrict Adminstrative Orgnization in Porncharoen District Bung Kan Province”. Journal of Roi Et Rajabhat University 15 (1):28-38. https://so03.tci-thaijo.org/index.php/reru/article/view/236311.