APA (7th ed.) Citation

Ferguson. (2006). The war of the world: History's age of hatred. Penguin Books.

Chicago Style (17th ed.) Citation

Ferguson. The War of the World: History's Age of Hatred. London: Penguin Books, 2006.

MLA (8th ed.) Citation

Ferguson. The War of the World: History's Age of Hatred. Penguin Books, 2006.

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