APA (7th ed.) Citation

Brooks, R. (2014). The knight who saved England: William Marshal and the French invasion, 1217 (1. publ. in Great Britain.). Osprey.

Chicago Style (17th ed.) Citation

Brooks, Richard. The Knight Who Saved England: William Marshal and the French Invasion, 1217. 1. publ. in Great Britain. Oxford: Osprey, 2014.

MLA (9th ed.) Citation

Brooks, Richard. The Knight Who Saved England: William Marshal and the French Invasion, 1217. 1. publ. in Great Britain. Osprey, 2014.