APA (7th ed.) Citation

Riordan, R. (2014). Heroes of Olympus: The blood Olympus. Puffin Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. Heroes of Olympus: The Blood Olympus. London: Puffin Books, 2014.

MLA (9th ed.) Citation

Riordan, Rick. Heroes of Olympus: The Blood Olympus. Puffin Books, 2014.

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