APA (7th ed.) Citation

Morgenthau, H. J. (1962). The purpose of American politics. Knopf.

Chicago Style (17th ed.) Citation

Morgenthau, Hans Joachim. The Purpose of American Politics. New York: Knopf, 1962.

MLA (9th ed.) Citation

Morgenthau, Hans Joachim. The Purpose of American Politics. Knopf, 1962.