Levin, G. (1979). Edward Hopper as illustrator: Gail Levin. Norton u.a..
Lua i Stíl Chicago (17ú heag.)Levin, Gail. Edward Hopper as Illustrator: Gail Levin. New York: Norton u.a., 1979.
Lua MLA (8ú heag.)Levin, Gail. Edward Hopper as Illustrator: Gail Levin. Norton u.a., 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.