APA (7th ed.) Citation

Khoury, R., & Ferrone, R. (2009). The sign: [a novel]. Penguin Audio.

Chicago Style (17th ed.) Citation

Khoury, Raymond, and Richard Ferrone. The Sign: [a Novel]. New York: Penguin Audio, 2009.

MLA (9th ed.) Citation

Khoury, Raymond, and Richard Ferrone. The Sign: [a Novel]. Penguin Audio, 2009.