MLA
African American Man Sitting on a Stool, with Four Men Posing behind Him, All Wearing Suits and Bow Ties. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/24947d7wq7-cor.
APA, 6th edition
African American man sitting on a stool, with four men posing behind him, all wearing suits and bow ties (Box 70). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/24947d7wq7-cor.
Chicago
“African American Man Sitting on a Stool, with Four Men Posing behind Him, All Wearing Suits and Bow Ties.” 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/24947d7wq7-cor.