Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

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