APA (7th ed.) Citation

Keegan. (1993). A history of warfare. Vintage Books.

Chicago Style (17th ed.) Citation

Keegan. A History of Warfare. New York: Vintage Books, 1993.

MLA (9th ed.) Citation

Keegan. A History of Warfare. Vintage Books, 1993.

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