APA (7th ed.) Citation

Norman, B. (1973). Secret warfare: The battle of codes and ciphers. David & Charles.

Chicago Style (17th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Ciphers. Newton Abbot, Devon: David & Charles, 1973.

MLA (8th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Ciphers. David & Charles, 1973.