MLA
Hill, Ruben E. Mural Being Superimposed on Walls by John B. William. 1945. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2. https://digital.library.emory.edu/purl/706g1jwt0n-cor.
APA, 6th edition
Hill, R. E. (1945). Mural being superimposed on walls by John B. William (Box 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/706g1jwt0n-cor.
Chicago
Hill, Ruben E. “Mural Being Superimposed on Walls by John B. William.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1945. Box 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/706g1jwt0n-cor.