Letters
MLA
Stieglitz, Alfred, 1864-1946. Letters. Box 84, folder 1699. 1925 Aug. https://collections.library.yale.edu/catalog/2039722.
APA, 6th edition
Stieglitz, Alfred, 1864-1946. (["Box 84, folder 1699"])(1925 Aug)[Letters]. https://collections.library.yale.edu/catalog/2039722.