MLA
Gravestone of John Jack, Died 1773, First African Slave Brought to This Country. 1924. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/102c866t3t-cor.
APA, 6th edition
Gravestone of John Jack, died 1773, first African slave brought to this country (Box 74). (1924). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t3t-cor.
Chicago
“Gravestone of John Jack, Died 1773, First African Slave Brought to This Country.” Postcards. Robert Langmuir African American Photograph Collection, 1924. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t3t-cor.