APA (7th ed.) Citation

Riordan, R., & Swanson, J. (2012). The mark of athena (Unabridged.). Listening Library.

Chicago Style (17th ed.) Citation

Riordan, Rick, and Joshua Swanson. The Mark of Athena. Unabridged. New York: Listening Library, 2012.

MLA (8th ed.) Citation

Riordan, Rick, and Joshua Swanson. The Mark of Athena. Unabridged. Listening Library, 2012.

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