MLA

Stieglitz, Alfred, 1864-1946. Letters. Box 86, folder 1725-1733. 1930 Jun-Aug. https://collections.library.yale.edu/catalog/2040165.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 86, folder 1725-1733"])(1930 Jun-Aug)[Letters]. https://collections.library.yale.edu/catalog/2040165.