APA (7th ed.) Citation

Collins, S., & Boehmer, P. (2005). Gregor the Overlander. Listening Library/Random House Audio.

Chicago Style (17th ed.) Citation

Collins, Suzanne, and Paul Boehmer. Gregor the Overlander. New York: Listening Library/Random House Audio, 2005.

MLA (9th ed.) Citation

Collins, Suzanne, and Paul Boehmer. Gregor the Overlander. Listening Library/Random House Audio, 2005.