APA (7th ed.) Citation

Hansen, A. H. (1946). America's role in the world economy. Penguin Books.

Chicago Style (17th ed.) Citation

Hansen, Alvin H. America's Role in the World Economy. New York: Penguin Books, 1946.

MLA (9th ed.) Citation

Hansen, Alvin H. America's Role in the World Economy. Penguin Books, 1946.