APA (7th ed.) Citation

Matheson, J., Bugmann, U., & Ammann, J. (1996). Hans Erni gestaltend.

Chicago Style (17th ed.) Citation

Matheson, John, Urs Bugmann, and Jean-Christophe Ammann. Hans Erni Gestaltend. 1996.

MLA (8th ed.) Citation

Matheson, John, et al. Hans Erni Gestaltend. 1996.