APA (7th ed.) Citation

Copeland, B. J. (2020). Colossus: The secrets of Bletchley Park's codebreaking computers. Oxford University Press.

Chicago Style (17th ed.) Citation

Copeland, B. Jack. Colossus: The Secrets of Bletchley Park's Codebreaking Computers. Oxford: Oxford University Press, 2020.

MLA (9th ed.) Citation

Copeland, B. Jack. Colossus: The Secrets of Bletchley Park's Codebreaking Computers. Oxford University Press, 2020.

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