Cita APA (7th ed.)

Rossi, P. H., Freeman, H. E., & Lipsey, M. W. (1999). Evaluation: A systematic approach (6th ed.). Sage Publications.

Cita Chicago (17th ed.)

Rossi, Peter H., Howard E. Freeman, i Mark W. Lipsey. Evaluation: A Systematic Approach. 6th ed. Thousand Oaks, California: Sage Publications, 1999.

Cita MLA (9th ed.)

Rossi, Peter H., et al. Evaluation: A Systematic Approach. 6th ed. Sage Publications, 1999.