MLA
Haskell, H. M. Portrait of an African American Man in a Band Uniform, Holding a flu_gelhorn, Sitting in a Chair. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 65. https://digital.library.emory.edu/purl/426m0cfxt5-cor.
APA, 6th edition
Haskell, H. M. Portrait of an African American man in a band uniform, holding a flu_gelhorn, sitting in a chair (Box 65) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/426m0cfxt5-cor.
Chicago
Haskell, H. M. “Portrait of an African American Man in a Band Uniform, Holding a flu_gelhorn, Sitting in a Chair.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 65. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/426m0cfxt5-cor.