APA (7th ed.) Citation

Sumner, I., & Hook, R. (2001). British colours & standards, 1747-1881. Osprey Publishing.

Chicago Style (17th ed.) Citation

Sumner, Ian, and Richard Hook. British Colours & Standards, 1747-1881. Oxford: Osprey Publishing, 2001.

MLA (9th ed.) Citation

Sumner, Ian, and Richard Hook. British Colours & Standards, 1747-1881. Osprey Publishing, 2001.