MLA
Two African American Men Playing Guitar around a Table, with a Man and Woman Serving Beverages on Top of It. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/665h9w0vz6-cor.
APA, 6th edition
Two African American men playing guitar around a table, with a man and woman serving beverages on top of it (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/665h9w0vz6-cor.
Chicago
“Two African American Men Playing Guitar around a Table, with a Man and Woman Serving Beverages on Top of It.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/665h9w0vz6-cor.