MLA
Spencer, Thomas. Trenches Used in the Battle of New Hope Church Fought on May 25 and 26th, 1864, near New Hope, Georgia. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 2. https://digital.library.emory.edu/purl/358bg79dqz-cor.
APA, 6th edition
Spencer, T. (1940). Trenches used in the Battle of New Hope Church fought on May 25 and 26th, 1864, near New Hope, Georgia (Box 15, Folder 2) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/358bg79dqz-cor.
Chicago
Spencer, Thomas. “Trenches Used in the Battle of New Hope Church Fought on May 25 and 26th, 1864, near New Hope, Georgia.” Black-and-white photographs. Civil War Collection, 1940. Box 15, Folder 2. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/358bg79dqz-cor.