Cita APA (7a ed.)

Sdun, N., & Gebbers, A. (2011). Helene Appel. Textem Verl..

Cita Chicago Style (17a ed.)

Sdun, Nora, y Anna-Catharina Gebbers. Helene Appel. Hamburg: Textem Verl., 2011.

Cita MLA (8a ed.)

Sdun, Nora, y Anna-Catharina Gebbers. Helene Appel. Textem Verl., 2011.