APA (7th ed.) Citation

Norman, B. (1973). Secret warfare: The battle of codes and ciphers. Acropolis Books.

Chicago Style (17th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Ciphers. Washington: Acropolis Books, 1973.

MLA (8th ed.) Citation

Norman, Bruce. Secret Warfare: The Battle of Codes and Ciphers. Acropolis Books, 1973.

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