APA (7th ed.) Citation

Langdon, J. W. (1991). July 1914: The long debate, 1918-1990. Berg.

Chicago Style (17th ed.) Citation

Langdon, John W. July 1914: The Long Debate, 1918-1990. New York: Berg, 1991.

MLA (9th ed.) Citation

Langdon, John W. July 1914: The Long Debate, 1918-1990. Berg, 1991.