APA (7th ed.) Citation

Riordan, R. (2021). Heroes of olympus: The house of hades. Penguin Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. Heroes of Olympus: The House of Hades. United Kingdom: Penguin Books, 2021.

MLA (9th ed.) Citation

Riordan, Rick. Heroes of Olympus: The House of Hades. Penguin Books, 2021.

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