MLA
Three African American Men Sitting on Steps, with Two Holding Dogs. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/651vdncjw2-cor.
APA, 6th edition
Three African American men sitting on steps, with two holding dogs (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdncjw2-cor.
Chicago
“Three African American Men Sitting on Steps, with Two Holding Dogs.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/651vdncjw2-cor.