Rossi, P. H., & Freeman, H. E. (1989). Evaluation: A systematic approach (4th ed.). Sage Publications.
Čikaški stil citiranja (17. izdanje)Rossi, Peter H., i Howard E. Freeman. Evaluation: A Systematic Approach. 4th ed. Newbury Park, Calif: Sage Publications, 1989.
MLA način citiranja (9. izdanje)Rossi, Peter H., i Howard E. Freeman. Evaluation: A Systematic Approach. 4th ed. Sage Publications, 1989.
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