APA (7th ed.) Citation

Stevenson, D. (2012). 1914-1918: The history of the First World War. Penguin Books.

Chicago Style (17th ed.) Citation

Stevenson, D. 1914-1918: The History of the First World War. London, [England]: Penguin Books, 2012.

MLA (9th ed.) Citation

Stevenson, D. 1914-1918: The History of the First World War. Penguin Books, 2012.