Wolfgang Robbe : Wilhelm-Lehmbruck-Stipendiat 1989-1990.

MLA

Brockhaus, Christoph, and Konrad Schilling. Wolfgang Robbe : Wilhelm-lehmbruck-stipendiat 1989-1990. Duisburg: Wilhelm-Lehmbruck-Museum, 1990.

APA

Brockhaus, C., & Schilling, K. (1990). Wolfgang Robbe : Wilhelm-Lehmbruck-Stipendiat 1989-1990. Duisburg: Wilhelm-Lehmbruck-Museum.

Chicago

Brockhaus, Christoph, and Konrad Schilling. Wolfgang Robbe: Wilhelm-Lehmbruck-Stipendiat 1989-1990. Duisburg: Wilhelm-Lehmbruck-Museum, 1990.