1. American Council on Education, Factbook on Higher Education. New York: Macmillan, 1989.
2. Bierman, H. Jr. and S.Smidt, The Capital Budgeting Decision. New York: Macmillan, 1993.
3. Blume, M.E., I. Friend, and R. Westerfield, Impediments to Capital Formation. Rodney L. White Center for Financial Research, University of Pennsylvania, 1980.
4. Brealey, R.A. and S.C.Myers, Principles of Corporate Finance. New York: McGraw-Hill, 1991.
5. Brigham, E.F., ?Hurdle Rates for Screening Capital Expenditure Proposals.? Financial Management 4 Fall, 17?25, (1975).