MLA
Unidentified Speakers and Entertainers - Man Speaking. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 1. https://digital.library.emory.edu/purl/921ghx3g22-cor.
APA, 6th edition
Unidentified Speakers and Entertainers - Man speaking (Box 7, Folder 1). (1940). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/921ghx3g22-cor.
Chicago
“Unidentified Speakers and Entertainers - Man Speaking.” 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/921ghx3g22-cor.