APA (7th ed.) Citation

Nesbit, R. C. (2008). Ultra versus U-Boats: Enigma decrypts in the National Archives (1. publ. in Great Britain.). Pen & Sword Military.

Chicago Style (17th ed.) Citation

Nesbit, Roy Conyers. Ultra Versus U-Boats: Enigma Decrypts in the National Archives. 1. publ. in Great Britain. Barnsley: Pen & Sword Military, 2008.

MLA (9th ed.) Citation

Nesbit, Roy Conyers. Ultra Versus U-Boats: Enigma Decrypts in the National Archives. 1. publ. in Great Britain. Pen & Sword Military, 2008.