APA (7th ed.) Citation

Riordan, R. Helden van Olympus. Boekerij.

Chicago Style (17th ed.) Citation

Riordan, Rick. Helden Van Olympus. Amsterdam: Boekerij.

MLA (9th ed.) Citation

Riordan, Rick. Helden Van Olympus. Boekerij.

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