APA (7th ed.) Citation

Norman, B. (1989). Secret warfare: The battle of codes and cyphers. David & Charles Publishers.

Chicago Style (17th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Cyphers. Newton Abbot, Devon: David & Charles Publishers, 1989.

MLA (9th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Cyphers. David & Charles Publishers, 1989.