APA (7th ed.) Citation

Beard, C. A. (1945). The economic basis of politics. A. A. Knopf.

Chicago Style (17th ed.) Citation

Beard, Charles Austin. The Economic Basis of Politics. New York: A. A. Knopf, 1945.

MLA (9th ed.) Citation

Beard, Charles Austin. The Economic Basis of Politics. A. A. Knopf, 1945.