APA (7th ed.) Citation

Becker, O. O., Langer, F., & Steffen, K. (2009). Above zero. Hatje Cantz.

Chicago Style (17th ed.) Citation

Becker, Olaf Otto, Freddy Langer, and Konrad Steffen. Above Zero. Ostfildern: Hatje Cantz, 2009.

MLA (9th ed.) Citation

Becker, Olaf Otto, et al. Above Zero. Hatje Cantz, 2009.