APA (7th ed.) Citation

Hajek, O., Klanten, R., & Commentz, S. (2009). Olaf Hajek: Flowerhead. Gestalten.

Chicago Style (17th ed.) Citation

Hajek, Olaf, Robert Klanten, and Sonja Commentz. Olaf Hajek: Flowerhead. Berlin: Gestalten, 2009.

MLA (9th ed.) Citation

Hajek, Olaf, et al. Olaf Hajek: Flowerhead. Gestalten, 2009.