Chelimsky, E., & Shadish, W. R. (1997). Evaluation for the 21st century: A handbook. Thousand Oaks, CA: Sage Publications.
2.
Posavac, E. J. (1998). Review of Evaluation for the 21st century: A handbook. American Journal of Evaluation, 19, 141-145.
3.
Weiss, C. H. (1998). Evaluation: Methods for studying programs and policies. Upper Saddle River, NJ: Prentice-Hall.
4.
Yin, R. (1997). Case study evaluations. In D. Rog and D. Fournier (Eds.), Progress and future directions in evaluation: Perspectives on theory, practice and methods (New Directions for Evaluation, No. 76). San Francisco: Jossey-Bass.