APA (7th ed.) Citation

Becker, O. O., Langer, F., & Steffen, K. (2009). Above zero / Olaf Otto Becker ; essays by Freddy Langer and Konrad Steffen. Hatje Cantz.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Becker, Olaf Otto, et al. Above Zero / Olaf Otto Becker ; Essays by Freddy Langer and Konrad Steffen. Hatje Cantz, 2009.

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