MLA
Florida Souvenir Co. (Saint Augustine, Fla.). The old city gate, St. Augustine, Florida. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/416c2fqz8g-cor.
APA, 6th edition
Florida Souvenir Co. (Saint Augustine, Fla.). (unknown)[The old city gate, St. Augustine, Florida]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/416c2fqz8g-cor.
Chicago
Florida Souvenir Co. (Saint Augustine, Fla.), The old city gate, St. Augustine, Florida, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/416c2fqz8g-cor.