APA (7th ed.) Citation

Riordan, R. (2013). Percy Jackson and the lightning thief. Penguin Group.

Chicago Style (17th ed.) Citation

Riordan, Rick. Percy Jackson and the Lightning Thief. London: Penguin Group, 2013.

MLA (9th ed.) Citation

Riordan, Rick. Percy Jackson and the Lightning Thief. Penguin Group, 2013.