Troyen, Carol (2007). "'A Stranger Worth Talking to': Profiles and Portraits of Edward Hopper". In Troyen, Carol, Kelly, Franklin, Barter, Judith A. Edward Hopper. MFA Publications. Museum of Fine Arts, Boston. p. 26. ISBN9780878467136. OCLC129510490.
Barter, Judith A. (2007). "Travels and Travails: Hopper's Late Pictures". In Troyen, Carol; Kelly, Franklin; Barter, Judith A. Edward Hopper. MFA Publications. Museum of Fine Arts, Boston. ISBN9780878467136. OCLC129510490.
Troyen, Carol (2007). "'A Stranger Worth Talking to': Profiles and Portraits of Edward Hopper". In Troyen, Carol, Kelly, Franklin, Barter, Judith A. Edward Hopper. MFA Publications. Museum of Fine Arts, Boston. p. 26. ISBN9780878467136. OCLC129510490.
Barter, Judith A. (2007). "Travels and Travails: Hopper's Late Pictures". In Troyen, Carol; Kelly, Franklin; Barter, Judith A. Edward Hopper. MFA Publications. Museum of Fine Arts, Boston. ISBN9780878467136. OCLC129510490.
Livingstone, Margaret (2014)[2002]. Vision and Art: The Biology of Seeing. Revised and expanded edition. New York: Abrams. ISBN9781419706929. OCLC828416672}.