Gaya APA

Posavac, E, J., Carey, R, G. (1985). Program Evaluation Methods and Case Studies . New Jersey: Prentice-Hall, Inc., Engleood Cliffs.

Gaya MLA

Posavac, Emil, J.., Carey, Raymond, G.. "Program Evaluation Methods and Case Studies". New Jersey: Prentice-Hall, Inc., Engleood Cliffs, 1985. Text.