MLA
Pierce. Portrait of an African American Man Wearing a Suit and Bow Tie. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/218dfn2z5d-cor.
APA, 6th edition
P. Portrait of an African American man wearing a suit and bow tie (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/218dfn2z5d-cor.
Chicago
Pierce. “Portrait of an African American Man Wearing a Suit and Bow Tie.” 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/218dfn2z5d-cor.