Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.