MLA
Three Men Sitting on the Very Front of a Locomotive. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 31. https://digital.library.emory.edu/purl/7956djhb1z-cor.
APA, 6th edition
Three men sitting on the very front of a locomotive (Box 31). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7956djhb1z-cor.
Chicago
“Three Men Sitting on the Very Front of a Locomotive.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7956djhb1z-cor.