Cooper, J. M., & Knock, T. J. (2010). Jefferson, Lincoln, and Wilson: The American dilemma of race and democracy. Charlottesville: University of Virginia Press.

Cooper, John Milton., and Thomas J. Knock. Jefferson, Lincoln, and Wilson: The American Dilemma of Race and Democracy. Charlottesville: University of Virginia Press, 2010.

Cooper, John Milton., and Thomas J. Knock. Jefferson, Lincoln, and Wilson: The American Dilemma of Race and Democracy. Charlottesville: University of Virginia Press, 2010.