MLA
Prince, Geo. A Portrait of John Roy Lynch. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 61. https://digital.library.emory.edu/purl/747dr7sqzh-cor.
APA, 6th edition
Prince, G. A portrait of John Roy Lynch (Box 61) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/747dr7sqzh-cor.
Chicago
Prince, Geo. “A Portrait of John Roy Lynch.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 61. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/747dr7sqzh-cor.