Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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