Davis, B. (1989). German expressionist prints and drawings. Prestel.
Chicago-Zitierstil (17. Ausg.)Davis, Bruce. German Expressionist Prints and Drawings. München: Prestel, 1989.
MLA-Zitierstil (8. Ausg.)Davis, Bruce. German Expressionist Prints and Drawings. Prestel, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.