APA (7th ed.) Citation

Riordan, R., & Haefs, G. (2013). Helden des Olymp. Carlsen.

Chicago Style (17th ed.) Citation

Riordan, Rick, and Gabriele Haefs. Helden Des Olymp. Hamburg: Carlsen, 2013.

MLA (9th ed.) Citation

Riordan, Rick, and Gabriele Haefs. Helden Des Olymp. Carlsen, 2013.

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