APA (7th ed.) Citation

Riordan, R. (2008). Percy Jackson and The Battle of The Labyrinth. the Penguin Group.

Chicago Style (17th ed.) Citation

Riordan, Rick. Percy Jackson and The Battle of The Labyrinth. the Penguin Group, 2008.

MLA (8th ed.) Citation

Riordan, Rick. Percy Jackson and The Battle of The Labyrinth. the Penguin Group, 2008.

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