MLA
Students, Groups, 1940s-1950s - Four Students Conversing. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 19, Folder 3. https://digital.library.emory.edu/purl/709w0vt55c-cor.
APA, 6th edition
Students, groups, 1940s-1950s - Four students conversing (Box 19, Folder 3). (1940). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/709w0vt55c-cor.
Chicago
“Students, Groups, 1940s-1950s - Four Students Conversing.” Black-and-white photographs. EU Office of Alumni Publications Photos Deposit Collection 2 , 1940. Box 19, Folder 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/709w0vt55c-cor.