Gaya APA

Cummings, P. et al (1983). Willem de Kooning : Drawings.Paintings.Sculpture.New York.Berlin.Paris . New York: Whitney Museum of American Art.

Gaya MLA

Cummings, Paul. et al. "Willem de Kooning : Drawings.Paintings.Sculpture.New York.Berlin.Paris". New York: Whitney Museum of American Art, 1983. Text.