1. Birkland, T. 2005. An Introduction to the Policy Process: Theories, Concepts, and Models of Public Policy Making. Armonk, NY: M. E. Sharpe.
2. Burroughs, R., and T. Clark. 1995. Ecosystem management: A comparison of Greater Yellowstone and Georges Bank. Environmental Management 19:649-663.
3. Clark, T. 2002. The Policy Process: A Practical Guide for Natural Resource Professionals. New Haven, CT: Yale University Press.
4. Crossett, K., T. Culliton, P. Wiley, and T. Goodspeed. 2004. Population Trends along the Coastal United States, 1980—2008. Washington, D.C.: National Oceanic and Atmospheric Administration.
5. Ehrlich, P., and A. Ehrlich. 1990. The Population Explosion. New York: Simon and Schuster.