Cita APA (7th ed.)

Richter, H. W., & Cofalla, S. (1997). Briefe. Hanser.

Cita Chicago (17th ed.)

Richter, Hans Werner, i Sabine Cofalla. Briefe. München [u.a.]: Hanser, 1997.

Cita MLA (8th ed.)

Richter, Hans Werner, i Sabine Cofalla. Briefe. Hanser, 1997.