Tripodi, T., Fellin, P., & Epstein, I. (1978). Differential social program evaluation. F. E. Peacock Publishers.
Cita Chicago (17th ed.)Tripodi, Tony, Phillip Fellin, i Irwin Epstein. Differential Social Program Evaluation. Itasca, Ill.: F. E. Peacock Publishers, 1978.
Cita MLA (8th ed.)Tripodi, Tony, et al. Differential Social Program Evaluation. F. E. Peacock Publishers, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.