Barfield, R.A. and J.N. Morgan (1970) Early Retirement: The Decision and the Experience . Ann Arbor: Institute of Social Research, University of Michigan.
2.
Feuer, L. (1969) The Conflict of Generations. New York: Basic Books.
3.
Havighurst, R.J., and J.M.A. Munnichs , B. Neugarten, and H. Thomae (1969) Adjustment to Retirement . Assen, Netherlands: Van Gorcum .
4.
Neugarten, B., R.J. Havighurst, and S.S. Tobin (1968) "Personality and patterns of aging," pp. 173-177 in B. Neugarten (ed.) Middle Age and Aging. Chicago: Univ. of Chicago Press.
5.
Rosow, I. (1967) Social Integration of the Aged. New York: Free Press.
6.
Seeley, J.R. (1969) "Youth in revolt," pp. 313-315 in Britannica Book of the Year. Chicago: Encyclopedia Britannica.
7.
Shanas, E., P. Townsend, D. Wedderburn, H. Friis, P. Milhj, and J. Stehouwer (1968) Older People in Three Industrial Societies. New York: Atherton Press.