Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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