APA (7th ed.) Citation

Riordan, R., & Bernstein, J. (2009). The demigod files (Unabridged.). Listening Library.

Chicago Style (17th ed.) Citation

Riordan, Rick, and Jesse Bernstein. The Demigod Files. Unabridged. New York: Listening Library, 2009.

MLA (8th ed.) Citation

Riordan, Rick, and Jesse Bernstein. The Demigod Files. Unabridged. Listening Library, 2009.

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