MLA
Gardiner, Charles J. Old Jack, One of the Oldest Inhabitants of St. Augustine, Florida. 1875. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16. https://digital.library.emory.edu/purl/3418kprrg5-cor.
APA, 6th edition
Gardiner, C. J. (1875). Old Jack, one of the oldest inhabitants of St. Augustine, Florida (Box 16) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprrg5-cor.
Chicago
Gardiner, Charles J. “Old Jack, One of the Oldest Inhabitants of St. Augustine, Florida.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1875. Box 16. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprrg5-cor.