MLA
Man Holding Reins of Horse. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16. https://digital.library.emory.edu/purl/0106wwpzs9-cor.
APA, 6th edition
Man holding reins of horse (Box 16). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwpzs9-cor.
Chicago
“Man Holding Reins of Horse.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 16. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0106wwpzs9-cor.