APA (7th ed.) Citation

Riordan, R. (2006). Percy Jackson and the sea of monster. Penguin Group.

Chicago Style (17th ed.) Citation

Riordan, Rick. Percy Jackson and the Sea of Monster. London: Penguin Group, 2006.

MLA (9th ed.) Citation

Riordan, Rick. Percy Jackson and the Sea of Monster. Penguin Group, 2006.

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