Rüdiger, U. (1996). Rolf Bier. artist : Kunstmagazin.
Cita Chicago (17th ed.)Rüdiger, Ulrike. "Rolf Bier." Artist : Kunstmagazin 1996.
Cita MLA (8th ed.)Rüdiger, Ulrike. "Rolf Bier." Artist : Kunstmagazin, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.