Cita APA (7a ed.)

Beer, K. E. (1961). The U.S.A. answers: A guide to understanding. U.S. and World Publications.

Cita Chicago Style (17a ed.)

Beer, Kenneth E. The U.S.A. Answers: A Guide to Understanding. New York: U.S. and World Publications, 1961.

Cita MLA (9a ed.)

Beer, Kenneth E. The U.S.A. Answers: A Guide to Understanding. U.S. and World Publications, 1961.