Tripodi, T., Fellin, P., & Epstein, I. (1978). Differential social program evaluation. F. E. Peacock Publishers.
Chicago Style aipamenaTripodi, Tony, Phillip Fellin, and Irwin Epstein. Differential Social Program Evaluation. Itasca, Ill.: F. E. Peacock Publishers, 1978.
MLA aipamenaTripodi, Tony, et al. Differential Social Program Evaluation. F. E. Peacock Publishers, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.