APA (7th ed.) Citation

Nicholls, D., & Layton, T. (2005). The understudy: [a novel]. HighBridge Audio.

Chicago Style (17th ed.) Citation

Nicholls, David, and Tristan Layton. The Understudy: [a Novel]. Minneapolis, Minn.: HighBridge Audio, 2005.

MLA (9th ed.) Citation

Nicholls, David, and Tristan Layton. The Understudy: [a Novel]. HighBridge Audio, 2005.