APA (7th ed.) Citation

Williams, M. (1989). International relations in the twentieth century: A reader. New York University Press.

Chicago Style (17th ed.) Citation

Williams, Marc. International Relations in the Twentieth Century: A Reader. New York: New York University Press, 1989.

MLA (9th ed.) Citation

Williams, Marc. International Relations in the Twentieth Century: A Reader. New York University Press, 1989.