MLA
Photo., Greene. Seated Picture of R. Emmett Stewart Wearing a Suit and Vest. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 50. https://digital.library.emory.edu/purl/849t1g1k29-cor.
APA, 6th edition
Photo., G. Seated picture of R. Emmett Stewart wearing a suit and vest (Box 50) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/849t1g1k29-cor.
Chicago
Photo., Greene. “Seated Picture of R. Emmett Stewart Wearing a Suit and Vest.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 50. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/849t1g1k29-cor.