APA (7th ed.) Citation

Johnson, B. (2014). The Churchill factor: How one man made history. Riverhead Books, a member of Penguin Group (USA).

Chicago Style (17th ed.) Citation

Johnson, Boris. The Churchill Factor: How One Man Made History. New York: Riverhead Books, a member of Penguin Group (USA), 2014.

MLA (8th ed.) Citation

Johnson, Boris. The Churchill Factor: How One Man Made History. Riverhead Books, a member of Penguin Group (USA), 2014.

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