Cita APA (7th ed.)

Rossi, P. H., & Freeman, H. E. (1993). Evaluation: A systematic approach (Fifth edition.). SAGE Publications.

Cita Chicago (17th ed.)

Rossi, Peter H., i Howard E. Freeman. Evaluation: A Systematic Approach. Fifth edition. California: SAGE Publications, 1993.

Cita MLA (8th ed.)

Rossi, Peter H., i Howard E. Freeman. Evaluation: A Systematic Approach. Fifth edition. SAGE Publications, 1993.