Cite

Big Sisters Day (group of female students with women members of the staff and the wives of male staff members)

MLA

Big Sisters Day (Group of Female Students with Women Members of the Staff and the Wives of Male Staff Members). 1931. https://collections.library.yale.edu/catalog/12374803.

APA, 6th edition

Big Sisters Day (group of female students with women members of the staff and the wives of male staff members). (1931). [Photographs (AAT)]. https://collections.library.yale.edu/catalog/12374803.