MLA
Men Working on a Railroad, with a Horse. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14. https://digital.library.emory.edu/purl/767wm37q3c-cor.
APA, 6th edition
Men working on a railroad, with a horse (Box 14). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37q3c-cor.
Chicago
“Men Working on a Railroad, with a Horse.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 14. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37q3c-cor.