APA (7th ed.) Citation

Kagan, D. (2003). The Peloponnesian war. Penguin Books.

Chicago Style (17th ed.) Citation

Kagan, Donald. The Peloponnesian War. New York: Penguin Books, 2003.

MLA (9th ed.) Citation

Kagan, Donald. The Peloponnesian War. Penguin Books, 2003.

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