MLA
Identified Speakers and Entertainers - Carl Sandburg and Dean Raimundo De Onies. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 12. https://digital.library.emory.edu/purl/767wm37qh4-cor.
APA, 6th edition
Identified Speakers and Entertainers - Carl Sandburg and Dean Raimundo de Onies (Box 6, Folder 12). (1940). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37qh4-cor.
Chicago
“Identified Speakers and Entertainers - Carl Sandburg and Dean Raimundo De Onies.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1940. Box 6, Folder 12. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/767wm37qh4-cor.