APA-Zitierstil (7. Ausg.)

(1969). German Expressionist watercolors: From the collections of the Wallraff-Richartz Museum, Cologne.

Chicago-Zitierstil (17. Ausg.)

German Expressionist Watercolors: From the Collections of the Wallraff-Richartz Museum, Cologne. Washington, D.C, 1969.

MLA-Zitierstil (8. Ausg.)

German Expressionist Watercolors: From the Collections of the Wallraff-Richartz Museum, Cologne. 1969.

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