Fitzpatrick, J. L., Sanders, J. R., & Worthen, B. R. (2011). Program evaluation: Alternative approaches and practical guidelines (4th edition.). Pearson Education.
Chicago-referens (17:e uppl.)Fitzpatrick, Jody L., James R. Sanders, och Blaine R. Worthen. Program Evaluation: Alternative Approaches and Practical Guidelines. 4th edition. Upper Saddle River, N.J: Pearson Education, 2011.
MLA-referens (9:e uppl.)Fitzpatrick, Jody L., et al. Program Evaluation: Alternative Approaches and Practical Guidelines. 4th edition. Pearson Education, 2011.
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