Chankaew, P. ., P. . Noimuenwai, and J. . Wattanasrisin. “Factors Influencing Morale of Professional Nurses in the Area of Three Southern Border Provinces”. Journal of Research in Nursing-Midwifery and Health Sciences, vol. 41, no. 3, Sept. 2021, pp. 35-49, https://he02.tci-thaijo.org/index.php/nur-psu/article/view/247027.