APA (7th ed.) Citation

Campbell, J. C. The United States in world affairs. Harper.

Chicago Style (17th ed.) Citation

Campbell, John Creighton. The United States in World Affairs. New York [u.a.]: Harper.

MLA (9th ed.) Citation

Campbell, John Creighton. The United States in World Affairs. Harper.

Warning: These citations may not always be 100% accurate.