APA (7th ed.) Citation

Carter, F., & Gallehawk, J. (1999). The Enigma machine and the bombe: The story of the breaking of the Enigma cipher over the period 1932 - 1945 (Rev. ed. July 1999.). Bletchley Park Trust.

Chicago Style (17th ed.) Citation

Carter, Frank, and John Gallehawk. The Enigma Machine and the Bombe: The Story of the Breaking of the Enigma Cipher over the Period 1932 - 1945. Rev. ed. July 1999. Milton Keynes, [England]: Bletchley Park Trust, 1999.

MLA (9th ed.) Citation

Carter, Frank, and John Gallehawk. The Enigma Machine and the Bombe: The Story of the Breaking of the Enigma Cipher over the Period 1932 - 1945. Rev. ed. July 1999. Bletchley Park Trust, 1999.