MLA
Old Black Joe : an Old African American Man in Overalls, Sitting on Steps. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/873pvmcvgq-cor.
APA, 6th edition
Old black Joe : an old African American man in overalls, sitting on steps (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/873pvmcvgq-cor.
Chicago
“Old Black Joe : an Old African American Man in Overalls, Sitting on Steps.” 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/873pvmcvgq-cor.