Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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