APA (7th ed.) Citation

Willmott, H. P. (2013). World War 1. Dorling Kindersley.

Chicago Style (17th ed.) Citation

Willmott, H. P. World War 1. New York: Dorling Kindersley, 2013.

MLA (8th ed.) Citation

Willmott, H. P. World War 1. Dorling Kindersley, 2013.