MLA

Fitzgerald, Robert, 1910-1985. Photographs. Box 94, folder 3291. 1950-74, n.d.. https://collections.library.yale.edu/catalog/2018952.

APA, 6th edition

Fitzgerald, Robert, 1910-1985. (["Box 94, folder 3291"])(1950-74, n.d.)[Photographs]. https://collections.library.yale.edu/catalog/2018952.