APA (7th ed.) Citation

Kahn, D. (1978). The codebreakers / David Kahn. Sphere.

Chicago Style (17th ed.) Citation

Kahn, David. The Codebreakers / David Kahn. London: Sphere, 1978.

MLA (9th ed.) Citation

Kahn, David. The Codebreakers / David Kahn. Sphere, 1978.

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