APA (7th ed.) Citation

Riordan,Rick. (2012). The Son of Neptune Heroes Olympus 2. Puffin.

Chicago Style (17th ed.) Citation

Riordan,Rick. The Son of Neptune Heroes Olympus 2. London: Puffin, 2012.

MLA (8th ed.) Citation

Riordan,Rick. The Son of Neptune Heroes Olympus 2. Puffin, 2012.

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