MLA
A Policeman in Uniform Standing with a Microphone in Front of Him with a Raised Platform behind Him Containing a Piano and a Couple of Chairs. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 8. https://digital.library.emory.edu/purl/583kwh70z7-cor.
APA, 6th edition
A policeman in uniform standing with a microphone in front of him with a raised platform behind him containing a piano and a couple of chairs (Box 8). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70z7-cor.
Chicago
“A Policeman in Uniform Standing with a Microphone in Front of Him with a Raised Platform behind Him Containing a Piano and a Couple of Chairs.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/583kwh70z7-cor.