Sylvia, R. D., & Sylvia, K. M. (2012). Program planning and evaluation for the public manager (4th ed.). Waveland Press.
Chicago-viite (17. p.)Sylvia, Ronald D., ja Kathleen M. Sylvia. Program Planning and Evaluation for the Public Manager. 4th ed. Long Grove, Ill.: Waveland Press, 2012.
MLA-viite (8. p.)Sylvia, Ronald D., ja Kathleen M. Sylvia. Program Planning and Evaluation for the Public Manager. 4th ed. Waveland Press, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.