APA (7th ed.) Citation

Hoefner, F., Sachs, H., & Schröder, S. (2009). Piccolo mondo. Gestalten.

Chicago Style (17th ed.) Citation

Hoefner, Franz, Harry Sachs, and Susanne Schröder. Piccolo Mondo. Berlin: Gestalten, 2009.

MLA (9th ed.) Citation

Hoefner, Franz, et al. Piccolo Mondo. Gestalten, 2009.