1. Alloway, R., & Bebbington, P. (1987). The buffer theory of social support—A review of the literature. Psychological Medicine, 17, 91–108.
2. Bishop, A. J., Martin, P., & Poon, L. (2006). Happiness and congruence in older adulthood: A structural model of life satisfaction. Aging and Mental Health, 10, 445–453.
3. Bjorner, J. B., Kristensen, T. S., Orth-Gomér, K., Tibblin, G., Sullivan, M., & Westerholm, P. (1996). Self-rated health: A useful concept in research, prevention, and clinical medicine. Stockholm: Swedish Council for Planning and Coordination of Research.
4. Brian, J. S., & Logan, J. (2001). Intergenerational relations: A comparison between Chinese and American families. Journal of Sociology, 2, 85–95 (in Chinese).
5. Chan, C. M. A., Phillips, D. R., Chi, I., Ho, S., Cheng, S. T., & Cheung, J. (2000). The study of the quality of life of elderly residents in the community in Hong Kong. Report submitted to the Health and Welfare Bureau, Hong Kong Government.