MLA

Stieglitz, Alfred, 1864-1946. Letters. Box 83, folder 1696. 1922 Oct. https://collections.library.yale.edu/catalog/2039557.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 83, folder 1696"])(1922 Oct)[Letters]. https://collections.library.yale.edu/catalog/2039557.