MLA
Services, Emory University Photographic. Unidentified Speakers and Entertainers - Two Men Speaking from Table. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 1. https://digital.library.emory.edu/purl/078gf1vj4m-cor.
APA, 6th edition
Services, E. U. P. (1940). Unidentified Speakers and Entertainers - Two men speaking from table (Box 7, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/078gf1vj4m-cor.
Chicago
Services, Emory University Photographic. “Unidentified Speakers and Entertainers - Two Men Speaking from Table.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1940. Box 7, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/078gf1vj4m-cor.