APA (7th ed.) Citation

Kagan, D. (2009). Thucydides: The reinvention of history. Viking.

Chicago Style (17th ed.) Citation

Kagan, Donald. Thucydides: The Reinvention of History. New York: Viking, 2009.

MLA (9th ed.) Citation

Kagan, Donald. Thucydides: The Reinvention of History. Viking, 2009.