MLA
Howard, Billy. Unidentified Speakers and Entertainers - Man Juggling on Running Track. 1970. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 2. https://digital.library.emory.edu/purl/4644qrfjvn-cor.
APA, 6th edition
Howard, B. (1970). Unidentified Speakers and Entertainers - Man juggling on running track (Box 7, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjvn-cor.
Chicago
Howard, Billy. “Unidentified Speakers and Entertainers - Man Juggling on Running Track.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1970. Box 7, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4644qrfjvn-cor.