APA (7th ed.) Citation

Dunning, W. A. (1921). A history of political theories. MacMillan.

Chicago Style (17th ed.) Citation

Dunning, William Archibald. A History of Political Theories. New York [etc.]: MacMillan, 1921.

MLA (9th ed.) Citation

Dunning, William Archibald. A History of Political Theories. MacMillan, 1921.