APA (7th ed.) Citation

HarperlhStephen. Capturing enigma: How HMS Petard seized the German naval codes.

Chicago Style (17th ed.) Citation

HarperlhStephen. Capturing Enigma: How HMS Petard Seized the German Naval Codes. Stroud, EnglandlbSutton Pub.lc1999.

MLA (9th ed.) Citation

HarperlhStephen. Capturing Enigma: How HMS Petard Seized the German Naval Codes.

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