APA (7th ed.) Citation
Smith, R. (2006). The utility of force: The art of war in the modern world. Penguin.
Chicago Style (17th ed.) Citation
Smith, Rupert. The Utility of Force: The Art of War in the Modern World. London: Penguin, 2006.
MLA (9th ed.) Citation
Smith, Rupert. The Utility of Force: The Art of War in the Modern World. Penguin, 2006.
Warning: These citations may not always be 100% accurate.