Thongthip, Boonruen, and Weerapol Kulbutra. “THE MANAGEMENT OF HUMAN RESOURCE TRANSFORMATION OF RANGER SECURITY GUARD INVESTIGATION CO., LTD”. Journal of MCU Nakhondhat 7, no. 11 (November 30, 2020): 342–356. Accessed March 29, 2024. https://so03.tci-thaijo.org/index.php/JMND/article/view/248305.