Brands, H. William. 1994. The United States in the World: A History of American Foreign Policy. Boston: Houghton Mifflin.
Howell, William G. and Jon C. Pevehouse. 2007. While Dangers Gather: Congressional Checks on Presidential War Powers. Princeton, NJ: Princeton University Press.
Krutz, Glen S. and Jeffrey S. Peake. 2009. Treaty Politics and the Rise of Executive Agreements: International Commitments in a System of Shared Powers. Ann Arbor: University of Michigan Press.
Nye, Joseph S. 2004. Soft Power: The Means to Success in World Politics. New York: Public Affairs.