MLA
L.L. Cook Co. (Milwaukee, Wis.). The old slave market, St. Augustine, Fla.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd256b-cor.
APA, 6th edition
L.L. Cook Co. (Milwaukee, Wis.). (unknown)[The old slave market, St. Augustine, Fla.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd256b-cor.
Chicago
L.L. Cook Co. (Milwaukee, Wis.), The old slave market, St. Augustine, Fla., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd256b-cor.