MLA
Ten Men Sitting in Front of a Waterfall. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/955m905qj7-cor.
APA, 6th edition
Ten men sitting in front of a waterfall (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/955m905qj7-cor.
Chicago
“Ten Men Sitting in Front of a Waterfall.” 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/955m905qj7-cor.