APA (7th ed.) Citation

Kahn. (1991). Seizing the enigma: The race to break the German U-boat codes 1939-1943. Thomas Congdon Book.

Chicago Style (17th ed.) Citation

Kahn. Seizing the Enigma: The Race to Break the German U-boat Codes 1939-1943. United State of America: Thomas Congdon Book, 1991.

MLA (8th ed.) Citation

Kahn. Seizing the Enigma: The Race to Break the German U-boat Codes 1939-1943. Thomas Congdon Book, 1991.