Sylvia, R. D., & Sylvia, K. M. (2012). Program planning and evaluation for the public manager (4th ed.). Waveland Press.

Sylvia, Ronald D., and Kathleen M. Sylvia. Program Planning and Evaluation for the Public Manager. 4th ed. Long Grove, Ill.: Waveland Press, 2012.

Sylvia, Ronald D., and Kathleen M. Sylvia. Program Planning and Evaluation for the Public Manager. 4th ed. Waveland Press, 2012.