.Posavac, E. J., & .Carey, R. G. (1985). Program evaluation: Methods and case studies (2nd ed.). Prentice-Hall.
Цитирование в стиле Чикаго (17-е изд.).Posavac, Emil J., и Raymond G. .Carey. Program Evaluation: Methods and Case Studies. 2nd ed. .Englewood Cliffs, N.J: Prentice-Hall, 1985.
Цитирование MLA (9-е изд.).Posavac, Emil J., и Raymond G. .Carey. Program Evaluation: Methods and Case Studies. 2nd ed. Prentice-Hall, 1985.