APA (7th ed.) Citation

Gilbert, A. (2009). Codes and ciphers. Firefly Books.

Chicago Style (17th ed.) Citation

Gilbert, Adrian. Codes and Ciphers. Buffalo, N.Y.: Firefly Books, 2009.

MLA (8th ed.) Citation

Gilbert, Adrian. Codes and Ciphers. Firefly Books, 2009.

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