MLA
Cole, Allen E. A Portrait of an African American Man Wearing a Suit and Glasses. 1902. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 51. https://digital.library.emory.edu/purl/648ffbg7gg-cor.
APA, 6th edition
Cole, A. E. (1902). A portrait of an African American man wearing a suit and glasses (Box 51) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/648ffbg7gg-cor.
Chicago
Cole, Allen E. “A Portrait of an African American Man Wearing a Suit and Glasses.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, 1902. Box 51. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/648ffbg7gg-cor.