MLA
Man Holding Reins of Horse near Tree. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16. https://digital.library.emory.edu/purl/0580k6djt2-cor.
APA, 6th edition
Man holding reins of horse near tree (Box 16). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0580k6djt2-cor.
Chicago
“Man Holding Reins of Horse near Tree.” Card photographs (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/0580k6djt2-cor.