Gassen, R. W. (2001). Sascha Langer: Raster, Farbe, Vibration.
Cita Chicago (17th ed.)Gassen, Richard W. Sascha Langer: Raster, Farbe, Vibration. Ludwigshafen, 2001.
Cita MLA (8th ed.)Gassen, Richard W. Sascha Langer: Raster, Farbe, Vibration. 2001.
Atenció: Aquestes cites poden no estar 100% correctes.