Levin, G. (1979). Edward Hopper: The complete prints. Norton.
Lua i Stíl Chicago (17ú heag.)Levin, Gail. Edward Hopper: The Complete Prints. New Yok [u.a.]: Norton, 1979.
Lua MLA (8ú heag.)Levin, Gail. Edward Hopper: The Complete Prints. Norton, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.