APA Citation

Riordan, R. (2013). Heroes of Olympus: The House of Hades. London: Puffin Books.

Chicago Style Citation

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

MLA Citation

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

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