APA (7th ed.) Citation

Welchman, G. (1984). The hut six story: Breaking the Enigma codes. Penguin Books.

Chicago Style (17th ed.) Citation

Welchman, Gordon. The Hut Six Story: Breaking the Enigma Codes. New York: Penguin Books, 1984.

MLA (9th ed.) Citation

Welchman, Gordon. The Hut Six Story: Breaking the Enigma Codes. Penguin Books, 1984.

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