MLA
Stanley. Slim-Marshall and His Smiling Billy Stewards-Floridians at Strong Ballroom, Philadelphia (Pa.). Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 25. https://digital.library.emory.edu/purl/187pnvx0pr-cor.
APA, 6th edition
S. Slim-Marshall and his Smiling Billy Stewards-Floridians at Strong Ballroom, Philadelphia (Pa.) (Box 25) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0pr-cor.
Chicago
Stanley. “Slim-Marshall and His Smiling Billy Stewards-Floridians at Strong Ballroom, Philadelphia (Pa.).” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 25. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/187pnvx0pr-cor.