APA-Zitierstil (7. Ausg.)

Freedman, M. (2001). Unravelling Enigma: Winning the Code War at Station X (Repr.). Leo Cooper.

Chicago-Zitierstil (17. Ausg.)

Freedman, Maurice. Unravelling Enigma: Winning the Code War at Station X. Repr. Barnsley, South Yorkshire: Leo Cooper, 2001.

MLA-Zitierstil (9. Ausg.)

Freedman, Maurice. Unravelling Enigma: Winning the Code War at Station X. Repr. Leo Cooper, 2001.