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DAVENPORTOVÁ, Alma. The History of Photography. Albuquerque: University of New Mexico Press, 1999. Dostupné online. ISBN978-0-8263-2076-6. S. 108. (anglicky)
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BOXER, Sarah. The Evolution of Alfred Stieglitz, Ever the Perfectionist [online]. New York Times, 2002-08-02 [cit. 2008-09-03]. Dostupné online. (anglicky)
HARRISON, Helen A. A Look at the Old West Through Smaller Works [online]. New York Times, 2002-03-31 [cit. 2008-09-03]. Dostupné online. (anglicky)
GOLDBERG, Vicki. More Stieglitz, if You Haven't Had Enough [online]. New York Times, 1995-09-17 [cit. 2008-09-03]. Dostupné online. (anglicky)
GLENNOVÁ, Martina. Alfred Stieglitz [online]. ArtMuseum.cz, 2009-2-26 [cit. 2009-05-16]. Dostupné v archivu pořízeném dne 2008-04-21.
Paul Strand Collection [PDF online]. Center for Creative Photography, The University of Arizona [cit. 2008-09-03]. S. 2. Dostupné v archivu pořízeném dne 2008-07-20. (anglicky)
Marsden Hartley Biography [online]. Hollis Taggart Galleries, 2007 [cit. 2009-06-28]. Dostupné v archivu pořízeném dne 2009-02-02. (anglicky)
