MLA

Stieglitz, Alfred, 1864-1946. Notes. Box 95, folder 1860. 1946 Feb. https://collections.library.yale.edu/catalog/2052798.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 95, folder 1860"])(1946 Feb)[Notes]. https://collections.library.yale.edu/catalog/2052798.