MLA
Union News Company (Boston, Mass.). The old oaken bucket in Dixie Land : African American men and boys around a well, with one boy looking in a bucket. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx9609-cor.
APA, 6th edition
Union News Company (Boston, Mass.). (unknown)[The old oaken bucket in Dixie Land : African American men and boys around a well, with one boy looking in a bucket]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx9609-cor.
Chicago
Union News Company (Boston, Mass.), The old oaken bucket in Dixie Land : African American men and boys around a well, with one boy looking in a bucket, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx9609-cor.