MLA
Art., C. T. American. Slave Block, St. Louis Hotel, New Orleans, La. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/235gb5mkpb-cor.
APA, 6th edition
Art., C. T. A. Slave block, St. Louis Hotel, New Orleans, La. (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/235gb5mkpb-cor.
Chicago
Art., C. T. American. “Slave Block, St. Louis Hotel, New Orleans, La.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/235gb5mkpb-cor.