Andrews, F. M., and Messenger, R. C. Multivariate Nominal Scale Analysis. Ann Arbor: Institute for Social Research, The University of Michigan, 1973.
Kerlinger, F. N., and Pedhazur, E. J. Multiple Regression in Behavioral Research. New York: Holt, Rinehart and Winston, 1973 p. 101
SAS: GLM