Packet of twelve tourism pictures
MLA
O'Neill, Eugene, 1888-1953. Packet of twelve tourism pictures. Box 90, folder 1547. [1931]. https://collections.library.yale.edu/catalog/9998304.
APA, 6th edition
O'Neill, Eugene, 1888-1953. (["Box 90, folder 1547"])([1931])[Packet of twelve tourism pictures]. https://collections.library.yale.edu/catalog/9998304.