Watcharasin, Natagorn. “Competency: Self- Development of Security Personnel to Keep Pace With Changes in Thailand 4.0”. Journal of MCU Humanities Review 5, no. 2 (January 8, 2020): 253–264. Accessed May 7, 2024. https://so03.tci-thaijo.org/index.php/human/article/view/176020.