Riordan, R. (2013). Heroes of olympus: The house of hades. Penguin.
Chicago-čujuhus (17. p.)Riordan, Rick. Heroes of Olympus: The House of Hades. London: Penguin, 2013.
MLA-čujuhus (9. p.)Riordan, Rick. Heroes of Olympus: The House of Hades. Penguin, 2013.
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