MLA
Benzur, Gabriel. Identified Speakers and Entertainers - John A. Sibley, Banker and Lawyer. 1950. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 11. https://digital.library.emory.edu/purl/788cfxppjh-cor.
APA, 6th edition
Benzur, G. (1950). Identified Speakers and Entertainers - John A. Sibley, banker and lawyer (Box 6, Folder 11) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxppjh-cor.
Chicago
Benzur, Gabriel. “Identified Speakers and Entertainers - John A. Sibley, Banker and Lawyer.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1950. Box 6, Folder 11. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/788cfxppjh-cor.