APA (7th ed.) Citation

Riordan, R. (2013). Heroes of olympus: The house of hades. Penguin.

Chicago Style (17th ed.) Citation

Riordan, Rick. Heroes of Olympus: The House of Hades. London: Penguin, 2013.

MLA (9th ed.) Citation

Riordan, Rick. Heroes of Olympus: The House of Hades. Penguin, 2013.