APA (7th ed.) Citation

Simenon, G., Gide, A., & Weiss, S. (1977). Briefwechsel. Diogenes.

Chicago Style (17th ed.) Citation

Simenon, Georges, André Gide, and Stefanie Weiss. Briefwechsel. Zurich: Diogenes, 1977.

MLA (9th ed.) Citation

Simenon, Georges, et al. Briefwechsel. Diogenes, 1977.