1. Avoiding type III error in program evaluation
2. and Effective Evaluation: Improving the Usefulness of Evaluation Results Through Responsive and Naturalistic Approaches. San Francisco: Jossey-Bass, 1981.
3. New Direction;House,1983
4. and How to Measure Program Implementation. Beverly Hills, Calif.: Sage, 1978.
5. and Program Evaluation: Methods and Case Studies. Englewood Cliffs, N.J.: Prentice-Hall, 1980.