MLA
Estrada, Sigrid. Identified Speakers and Entertainers - Dr. Pearl E. Primus. 1978. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6, Folder 13. https://digital.library.emory.edu/purl/627zkh18zf-cor.
APA, 6th edition
Estrada, S. (1978). Identified Speakers and Entertainers - Dr. Pearl E. Primus (Box 6, Folder 13) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18zf-cor.
Chicago
Estrada, Sigrid. “Identified Speakers and Entertainers - Dr. Pearl E. Primus.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1978. Box 6, Folder 13. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18zf-cor.