Cita APA (7th ed.)

Haff, M. C. (2009). Klaus Walter. Sandstein Verl..

Cita Chicago (17th ed.)

Haff, Marie Cathleen. Klaus Walter. Dresden: Sandstein Verl., 2009.

Cita MLA (8th ed.)

Haff, Marie Cathleen. Klaus Walter. Sandstein Verl., 2009.