ปัญญา ศิริลักษณ์, and โทวันนัง รุ่งอรุณ. “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, no. 1 (January 1, 2018): 12–21. accessed September 23, 2026. https://he02.tci-thaijo.org/index.php/JRIHS/article/view/213161.