APA (7th ed.) Citation

Riordan, R. (2008). The battle of Labyrinth. Hyperion Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. The Battle of Labyrinth. New York: Hyperion Books, 2008.

MLA (9th ed.) Citation

Riordan, Rick. The Battle of Labyrinth. Hyperion Books, 2008.

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