MLA
Three Young Men with Toy Guns on Railroad Tracks. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 31. https://digital.library.emory.edu/purl/433dz08kv1-cor.
APA, 6th edition
Three young men with toy guns on railroad tracks (Box 31). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/433dz08kv1-cor.
Chicago
“Three Young Men with Toy Guns on Railroad Tracks.” Card photographs (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/433dz08kv1-cor.