APA (7th ed.) Citation

Williamson, G. Kriegsmarine U-boats: 1939 - 45 (1. publ.). Osprey.

Chicago Style (17th ed.) Citation

Williamson, Gordon. Kriegsmarine U-boats: 1939 - 45. 1. publ. Oxford: Osprey.

MLA (9th ed.) Citation

Williamson, Gordon. Kriegsmarine U-boats: 1939 - 45. 1. publ. Osprey.

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