MLA

Stieglitz, Alfred, 1864-1946. Letters. Box 71, folder 1532-1542. 1934 May-Aug. https://collections.library.yale.edu/catalog/2041835.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 71, folder 1532-1542"])(1934 May-Aug)[Letters]. https://collections.library.yale.edu/catalog/2041835.