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Citace podle Chicago (17th ed.).Posavac, Emil J., a Raymond G. .Carey. Program Evaluation: Methods and Case Studies. 2nd ed. .Englewood Cliffs, N.J: Prentice-Hall, 1985.
Citace podle MLA (9th ed.).Posavac, Emil J., a Raymond G. .Carey. Program Evaluation: Methods and Case Studies. 2nd ed. Prentice-Hall, 1985.