1. Achenbaum, A. (1978). Old age in the new land: The American experience since 1970. Baltimore: Johns Hopkins University Press.
2. Allport, G.W., Bruner, J. S., & Jandorf, E. M. (1941). Personality under social catastrophe: Ninety life-histories of the Nazi revolution. Journal of Personality, 10, 1–22.
3. Baltes, P. B. (1979). Life-span development psychology: Some converging observations on history and theory. In P. B. Baltes & O. G. Brim, Jr. (Eds.), Life-span development and behavior (Vol. 2) (pp. 256–279). New York: Academic Press.
4. Becker, G. S. (1975). Human capital: A theoretical and empirical analysis with special reference to education. New York: Columbia University Press.
5. Bengtson, V.L., & Dannefer, F. (1987). Families, work and aging: Implications of disordered cohort flow for the 21st century. In R. Ward & S. Tobin (Eds.), Health and aging: Sociological issues and policy directions (pp. 256–289). New York: Springer-Verlag.