MLA

Fitzgerald, Robert, 1910-1985. Photographs. Box 95, folder 3341. n.d.. https://collections.library.yale.edu/catalog/2018950.

APA, 6th edition

Fitzgerald, Robert, 1910-1985. (["Box 95, folder 3341"])(n.d.)[Photographs]. https://collections.library.yale.edu/catalog/2018950.