Letters
MLA
Stieglitz, Alfred, 1864-1946. Letters. Box 62, folder 1419-1425. 1918 May-Sep. https://collections.library.yale.edu/catalog/2039782.
APA, 6th edition
Stieglitz, Alfred, 1864-1946. (["Box 62, folder 1419-1425"])(1918 May-Sep)[Letters]. https://collections.library.yale.edu/catalog/2039782.