MLA
Shannon, Frank. An African American Man Playing Banjo. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/112m63xsnm-cor.
APA, 6th edition
Shannon, F. An African American man playing banjo (Box 70) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/112m63xsnm-cor.
Chicago
Shannon, Frank. “An African American Man Playing Banjo.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/112m63xsnm-cor.