APA (7th ed.) Citation

Riordan, R. (2012). The heroes of Olympus: The demigod diaries (First edition.). Disney/Hyperion Books.

Chicago Style (17th ed.) Citation

Riordan, Rick. The Heroes of Olympus: The Demigod Diaries. First edition. New York: Disney/Hyperion Books, 2012.

MLA (8th ed.) Citation

Riordan, Rick. The Heroes of Olympus: The Demigod Diaries. First edition. Disney/Hyperion Books, 2012.

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