MLA
Bennett, Howard. Old African American Man in a Hat and Suit with a Pocket Watch. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/576rxwdbvv-cor.
APA, 6th edition
Bennett, H. Old African American man in a hat and suit with a pocket watch (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbvv-cor.
Chicago
Bennett, Howard. “Old African American Man in a Hat and Suit with a Pocket Watch.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/576rxwdbvv-cor.