1. Abbott A . (1988). The system of professions: An essay on the division of expert labor. Chicago, IL: University of Chicago Press.
2. Perceived organizational membership and the retention of older workers
3. Ashforth B . (2001). Role transitions in organizational life: An identity- based perspective. Mahwah, NJ: Erlbaum.
4. Factors affecting physicians’ early retirement intentions: Implications for healthcare delivery;Bahrami;Journal of Business & Economics Research,2011
5. To retire or not to retire: That is not the question