↑ Ian Chilvers and Harold Osborne (Eds.), The Oxford Dictionary of Art Oxford University Press, 1997 (second edition), p. 273, ISBN0-19-860084-4 "The central theme of his work is the loneliness of city life, generally expressed through one or two figures in a spare setting - his best-known work, Nighthawks, has an unusually large 'cast' with four."
↑ Brooks, Katherine (July 22, 2012). "Happy Birthday, Edward Hopper!". The Huffington Post. TheHuffingtonPost.com, Inc. สืบค้นเมื่อ May 5, 2013.
1 2 The sale was recorded by Josephine Hopper as follows, in volume II, p. 95 of her and Edward's journal of his art: "May 13, '42: Chicago Art Institute - 3,000 + return of Compartment C in exchange as part payment. 1,000 - 1/3 = 2,000." See Deborah Lyons, Edward Hopper: A Journal of His Work. New York: Whitney Museum of American Art, 1997, p. 63.
↑ Gail Levin, Edward Hopper: An Intimate Biography. New York: Rizzoli, 2007, pp. 351-2, citing Jo Hopper's diary entry for March 17, 1942.
↑ Hopper, interview with Katharine Kuh, in The Artist's Voice: Talks with Seventeen Modern Artists. 1962. Reprinted, New York: Da Capo Press, 2000, p. 134.
