Haorang, N., Subruangthong, W. and Rattanasermpong, M. (2025) “Personnel Happiness at Work of the Investigation Division, Provincial Police Region 1”, Lawarath Social E-Journal, 7(1), pp. 103–120. available at: https://so04.tci-thaijo.org/index.php/lawarathjo/article/view/274651 (accessed: 17 September 2026).