Rossi, P. H., Lipsey, M., & Freeman, H. E. (2004). Evaluation: A Systematic Approach (7 th ed.). Thousand Oaks, CA: Sage.
This is the other source..However, It is a book I think Ive included all the information I need from the book so no need to worry about this part but in the event one may need it here is the source.
Also this is a Policy, Planning, and Budgeting class.