MLA
The Home Stretch in Florida African American Boy Riding an Alligator [Hand Colored]. 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/7956djh9z0-cor.
APA, 6th edition
The home stretch in Florida African American boy riding an alligator [hand colored] (Box 72). (1914). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7956djh9z0-cor.
Chicago
“The Home Stretch in Florida African American Boy Riding an Alligator [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, 1914. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/7956djh9z0-cor.