MLA

Stieglitz, Alfred, 1864-1946. Letters. Box 232, folder 4088-4098. 1985. https://collections.library.yale.edu/catalog/10577014.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 232, folder 4088-4098"])(1985)[Letters]. https://collections.library.yale.edu/catalog/10577014.