MLA
Two African American Jockeys Wearing Hats, One Holding a Cane and the Other Holding a Cigar. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 38. https://digital.library.emory.edu/purl/375dbrv19k-cor.
APA, 6th edition
Two African American jockeys wearing hats, one holding a cane and the other holding a cigar (Box 38). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/375dbrv19k-cor.
Chicago
“Two African American Jockeys Wearing Hats, One Holding a Cane and the Other Holding a Cigar.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 38. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/375dbrv19k-cor.