APA (7th ed.) Citation

Riordan, R. (2008). Percy Jackson: And the sea of monsters. Puffin Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. Percy Jackson: And the Sea of Monsters. London: Puffin Books, 2008.

MLA (9th ed.) Citation

Riordan, Rick. Percy Jackson: And the Sea of Monsters. Puffin Books, 2008.