MLA
Three African American Men Sitting in Chairs Playing Guitars, with a Woman Sitting next to Them, in Front of a Buildin. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/7612ngf207-cor.
APA, 6th edition
Three African American men sitting in chairs playing guitars, with a woman sitting next to them, in front of a buildin (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7612ngf207-cor.
Chicago
“Three African American Men Sitting in Chairs Playing Guitars, with a Woman Sitting next to Them, in Front of a Buildin.” 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/7612ngf207-cor.