Letters
MLA
Stieglitz, Alfred, 1864-1946. Letters. Box 76, folder 1597-1600. 1940 Sep-Nov. https://collections.library.yale.edu/catalog/2043560.
APA, 6th edition
Stieglitz, Alfred, 1864-1946. (["Box 76, folder 1597-1600"])(1940 Sep-Nov)[Letters]. https://collections.library.yale.edu/catalog/2043560.