MLA
Perry, Barton. Emory Miscellany - Flag at Half-Mast Because of Death of the Last Surviving Confederate Veteran, Walter Washington Williams. 1959. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 4. https://digital.library.emory.edu/purl/938jdfn3hj-cor.
APA, 6th edition
Perry, B. (1959). Emory Miscellany - Flag at half-mast because of death of the last surviving Confederate veteran, Walter Washington Williams (Box 2, Folder 4) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn3hj-cor.
Chicago
Perry, Barton. “Emory Miscellany - Flag at Half-Mast Because of Death of the Last Surviving Confederate Veteran, Walter Washington Williams.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1959. Box 2, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/938jdfn3hj-cor.