1. Brinkerhoff, R. O., Brethower, D. M., Hluchyj, T., and Nowakowski, J. R. (1983). Program evaluation: A practitioner’s guide for trainers and educators. Boston: Kluwer-Nijhoff Publishing.
2. Cook, T. D., and Reichardt, C. S. (Eds.). (1979). Qualitative and quantitative methods in evaluation research. Beverly Hills, CA: Sage.
3. Fetterman, D. M. (1989). Ethnography: Step by step. Newbury Park, CA: Sage.
4. Fitz-Gibbon, C. T., and Morris, L. L. (1987). How to design a program evaluation. In J. L. Herman (Ed.), Program evaluation kit (2’d ed.). Newbury Park, CA: Sage.
5. Frankel, B. (1982). On participant observation as a component of evaluation: Strategies, constraints, and issues. Evaluation and Program Planning, 5 (3), 239–246.