APA (7th ed.) Citation

Gilbert, A. (2009). Secret agents. Firefly Books.

Chicago Style (17th ed.) Citation

Gilbert, Adrian. Secret Agents. Buffalo, N.Y.: Firefly Books, 2009.

MLA (8th ed.) Citation

Gilbert, Adrian. Secret Agents. Firefly Books, 2009.

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