MLA
Spencer, Thomas. Tombstone of Seminole Chief Osceola Who Died at Fort Moultrie, South Carolina in 1838. 1954. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 15, Folder 6. https://digital.library.emory.edu/purl/8773tx970w-cor.
APA, 6th edition
Spencer, T. (1954). Tombstone of Seminole Chief Osceola who died at Fort Moultrie, South Carolina in 1838 (Box 15, Folder 6) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx970w-cor.
Chicago
Spencer, Thomas. “Tombstone of Seminole Chief Osceola Who Died at Fort Moultrie, South Carolina in 1838.” Black-and-white photographs. Civil War Collection, 1954. Box 15, Folder 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx970w-cor.