ปัญญา ศ., & โทวันนัง ร. (2018). The study on factors affecting work happiness of staffs at a drug addiction Rehabilitation ward in the Northeast. Journal of Ratchathani Innovative Health Sciences, 2(1), 12–21. Retrieved from https://he02.tci-thaijo.org/index.php/JRIHS/article/view/213161