APA (7th ed.) Citation

Riordan, R. (2011). The son of Neptune (First edition.). Disney / Hyperion Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. The Son of Neptune. First edition. New York: Disney / Hyperion Books, 2011.

MLA (9th ed.) Citation

Riordan, Rick. The Son of Neptune. First edition. Disney / Hyperion Books, 2011.

Warning: These citations may not always be 100% accurate.