Schrammel, I. (2015). Roswitha Geyer. Neue Keramik.
Cita Chicago (17th ed.)Schrammel, Imre. "Roswitha Geyer." Neue Keramik 2015.
Cita MLA (8th ed.)Schrammel, Imre. "Roswitha Geyer." Neue Keramik, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.