MLA
Color Portrait of Sonny Boy Williamson. 1930. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 3. https://digital.library.emory.edu/purl/808v9s4n24-cor.
APA, 6th edition
Color portrait of Sonny Boy Williamson (Box 3). (1930). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/808v9s4n24-cor.
Chicago
“Color Portrait of Sonny Boy Williamson.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1930. Box 3. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/808v9s4n24-cor.