1. Alkin M. C. (Ed.). (2013). Peter Rossi in evaluation roots (2nd ed., p. 111). Thousand Oaks, CA: Sage.
2. Bok S. (1984). Secrets (p. 183). New York, NY: Vintage Books.
3. Caldwell L. K. (1982b). Hamilton and executive leadership. In American public administration: Patterns of the past (pp. 75, 82, 83, 88). Washington, DC: American Society for Public Administration.
4. Retrospective and Prospective Analysis: Linking Program Evaluation and Forecasting