ศิวะกรภูริหิรัญ การัณยภาส, and จิตรนันท์ ธัชชัย. “The Development of Program for Enhancing Personnel Officers’ Competency in Personnel Administration Section under Kalasin Primary Educational Service Area Office 2”. Journal of Roi Et Rajabhat University 13, no. 1 (April 29, 2019): 38–48. Accessed April 25, 2024. https://so03.tci-thaijo.org/index.php/reru/article/view/185906.