Royse, D., Thyer, B. A., Padgett, D. K., & Logan, T. K. (2001). Program evaluation: An introduction (Tercera edición.). Brooks/Cole Thomson Learning.
Citazione stile Chigago Style (17a edizione)Royse, David, Bruce A. Thyer, Deborah K. Padgett, e T. K. Logan. Program Evaluation: An Introduction. Tercera edición. Wadsworth: Brooks/Cole Thomson Learning, 2001.
Citatione MLA (8a ed.)Royse, David, et al. Program Evaluation: An Introduction. Tercera edición. Brooks/Cole Thomson Learning, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.