MLA

Stettheimer, Florine, 1871-1944. Photograph of Ettie Stettheimer in academic cap and gown. Box 10, folder 179. n.d.. https://collections.library.yale.edu/catalog/2003254.

APA, 6th edition

Stettheimer, Florine, 1871-1944. (["Box 10, folder 179"])(n.d.)[Photograph of Ettie Stettheimer in academic cap and gown]. https://collections.library.yale.edu/catalog/2003254.