1. Anderson, R.E. New Competition for an old market.Lifelong Learning, September, 1977.
2. Anderson, R.E. and G.G. Darkenwald.Participation and persistence in american adult education. New York: The College Board, forthcoming.
3. Berls, R.H. Higher education opportunity and achievement in the United States. In The Joint Economic Committee of Congress,The Economics and Financing of Higher Education in the United States, Washington, D.C.: The U.S. Government Printing Office, 1969.
4. Carp, A., Peterson, R., and Roelfs, P. Adult learning interests and experiences. InPlanning Non-Traditional Programs. K.P. Cross and J. Valley (Eds.). San Francisco: Jossey-Bass, 1974.
5. Freeman, R.B.The over-educated american. New York: Academic Press, 1976.