MLA
Howlin' Wolf (Left) with Sonny Boy Williamson (Right) and His Sister. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 23. https://digital.library.emory.edu/purl/982x3ffbkz-cor.
APA, 6th edition
Howlin' Wolf (left) with Sonny Boy Williamson (right) and his sister (Box 23). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/982x3ffbkz-cor.
Chicago
“Howlin' Wolf (Left) with Sonny Boy Williamson (Right) and His Sister.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 23. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/982x3ffbkz-cor.