APA (7th ed.) Citation

Clausewitz, C. v., & Graham, J. (2005). On the nature of war. Penguin Books.

Chicago Style (17th ed.) Citation

Clausewitz, Carl von, and J.J Graham. On the Nature of War. London: Penguin Books, 2005.

MLA (9th ed.) Citation

Clausewitz, Carl von, and J.J Graham. On the Nature of War. Penguin Books, 2005.