Ehrlich, D. (1989). Masterpieces of the 20th century painting. Mallard Press.
Lua i Stíl Chicago (17ú heag.)Ehrlich, Doreen. Masterpieces of the 20th Century Painting. New York: Mallard Press, 1989.
Lua MLA (9ú heag.)Ehrlich, Doreen. Masterpieces of the 20th Century Painting. Mallard Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.