MLA

Stieglitz, Alfred, 1864-1946. Chabot, Maria. Box 183, folder 3072-3075. 1941-42. https://collections.library.yale.edu/catalog/2003106.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 183, folder 3072-3075"])(1941-42)[Chabot, Maria]. https://collections.library.yale.edu/catalog/2003106.