Satit Chuayounan. (2022) The Causal Relationship Model of The Happiness of the Working Elderly within Career Groups. <i>International Journal of Multidisciplinary in Management and Tourism</i>, <i>6</i>(1), 18-32.Satit Chuayounan. "The Causal Relationship Model of The Happiness of the Working Elderly within Career Groups". International Journal of Multidisciplinary in Management and Tourism 6 (2022):18-32.Satit Chuayounan. The Causal Relationship Model of The Happiness of the Working Elderly within Career Groups. Luangporyai Association:ม.ป.ท. 2022.