Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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