APA (7th ed.) Citation

Purdue, A. W. (1999). The Second World War. St. Martin's Press.

Chicago Style (17th ed.) Citation

Purdue, A. W. The Second World War. New York: St. Martin's Press, 1999.

MLA (8th ed.) Citation

Purdue, A. W. The Second World War. St. Martin's Press, 1999.