APA (7th ed.) Citation

Fontane, T., Keitel, W., & Nürnberger, H. (1988). Briefe. Hanser.

Chicago Style (17th ed.) Citation

Fontane, Theodor, Walter Keitel, and Helmuth Nürnberger. Briefe. München: Hanser, 1988.

MLA (9th ed.) Citation

Fontane, Theodor, et al. Briefe. Hanser, 1988.