APA aipamena

Riordan,Rick. (2015). Heroes of olympus: The blood of olympus. Puffin Books.

Chicago Style aipamena

Riordan,Rick. Heroes of Olympus: The Blood of Olympus. UK: Puffin Books, 2015.

MLA aipamena

Riordan,Rick. Heroes of Olympus: The Blood of Olympus. Puffin Books, 2015.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.