MLA
Layne, Cecil. Man Shaking Hands with Another Man next to a Portrait of the First Man. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 31. https://digital.library.emory.edu/purl/607gqnk9f7-cor.
APA, 6th edition
Layne, C. Man shaking hands with another man next to a portrait of the first man (Box 31) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9f7-cor.
Chicago
Layne, Cecil. “Man Shaking Hands with Another Man next to a Portrait of the First Man.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/607gqnk9f7-cor.