MLA
African American Porter next to a Chair. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/781jh9w110-cor.
APA, 6th edition
African American porter next to a chair (Box 71). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w110-cor.
Chicago
“African American Porter next to a Chair.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/781jh9w110-cor.