Rossi, P. H., Freeman, H. E., & Lipsey, M. W. (1999). Evaluation: A systematic approach (6th ed.). Sage.
Chicago Style (17th ed.) CitationRossi, Peter Henry, Howard E. Freeman, and Mark W. Lipsey. Evaluation: A Systematic Approach. 6th ed. Thousand Oaks, Calif: Sage, 1999.
MLA (9th ed.) CitationRossi, Peter Henry, et al. Evaluation: A Systematic Approach. 6th ed. Sage, 1999.
Warning: These citations may not always be 100% accurate.