APA (7th ed.) Citation

Asimov, I., & Brick, S. (2011). Prelude to foundation (Unabridged.). Random House Audio.

Chicago Style (17th ed.) Citation

Asimov, Isaac, and Scott Brick. Prelude to Foundation. Unabridged. New York: Random House Audio, 2011.

MLA (8th ed.) Citation

Asimov, Isaac, and Scott Brick. Prelude to Foundation. Unabridged. Random House Audio, 2011.

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