MLA
Three African American Men in Suits Sitting in a Cemetery, Holding Hats and an American Flag. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/1741rn8pp8-cor.
APA, 6th edition
Three African American men in suits sitting in a cemetery, holding hats and an American flag (Box 71). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1741rn8pp8-cor.
Chicago
“Three African American Men in Suits Sitting in a Cemetery, Holding Hats and an American Flag.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1741rn8pp8-cor.