MLA
Layne, Cecil. Man Standing next to Man on Piano. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 31. https://digital.library.emory.edu/purl/1913n5tb7f-cor.
APA, 6th edition
Layne, C. Man standing next to man on piano (Box 31) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1913n5tb7f-cor.
Chicago
Layne, Cecil. “Man Standing next to Man on Piano.” 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/1913n5tb7f-cor.