MLA
Spencer, Thomas. Iron Skillet Belonging to the Union Army Taken from the Battlefield in Decatur, Georgia in July 1864 by Eliza Emily Mills Hunter after Confederate Solders Drove Union Solders out of Decatur. 1953. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 14, Folder 5. https://digital.library.emory.edu/purl/81289320hv-cor.
APA, 6th edition
Spencer, T. (1953). Iron skillet belonging to the Union army taken from the battlefield in Decatur, Georgia in July 1864 by Eliza Emily Mills Hunter after Confederate solders drove Union solders out of Decatur (Box 14, Folder 5) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81289320hv-cor.
Chicago
Spencer, Thomas. “Iron Skillet Belonging to the Union Army Taken from the Battlefield in Decatur, Georgia in July 1864 by Eliza Emily Mills Hunter after Confederate Solders Drove Union Solders out of Decatur.” Black-and-white photographs. Civil War Collection, 1953. Box 14, Folder 5. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81289320hv-cor.