Rossi, P. H., Lipsey, M. W., & Freeman, H. E. (2004). Evaluation: A systematic approach (7th ed.). Sage.
Chicago Style (17th ed.) CitationRossi, Peter H., Mark W. Lipsey, and Howard E. Freeman. Evaluation: A Systematic Approach. 7th ed. Thousand Oaks, CA: Sage, 2004.
MLA (8th ed.) CitationRossi, Peter H., et al. Evaluation: A Systematic Approach. 7th ed. Sage, 2004.
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