MLA
Santway Photo-Craft Company (Watertown, N.Y.). Putting an alligator to sleep by rubbing his belly, 'gator farm in Florida [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9d8-cor.
APA, 6th edition
Santway Photo-Craft Company (Watertown, N.Y.). (unknown)[Putting an alligator to sleep by rubbing his belly, 'gator farm in Florida [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9d8-cor.
Chicago
Santway Photo-Craft Company (Watertown, N.Y.), Putting an alligator to sleep by rubbing his belly, 'gator farm in Florida [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9d8-cor.