Laononkhro, Benjaporn, and Pirada Chairatana. “Organizational Commitment and Job Motivation of Traffic Officers in Traffic Operation Department at State Railway of Thailand”. Research and Development Journal, Loei Rajabhat University 15, no. 53 (August 20, 2020): 21–31. accessed September 29, 2026. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/242211.