MLA

Stieglitz, Alfred, 1864-1946. Art Institute of Chicago. Box 3, folder 60. 1916-45. https://collections.library.yale.edu/catalog/17105614.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 3, folder 60"])(1916-45)[Art Institute of Chicago]. https://collections.library.yale.edu/catalog/17105614.