Riordan, R. (2015). Heroes of Olympus: The son of neptune. Puffin Books.
Chicago Style (17th ed.) CitationRiordan, Rick. Heroes of Olympus: The Son of Neptune. UK: Puffin Books, 2015.
MLA (9th ed.) CitationRiordan, Rick. Heroes of Olympus: The Son of Neptune. Puffin Books, 2015.
Warning: These citations may not always be 100% accurate.