MLA
Walthall, Edward C. (Edward Cary), 1831-1898. Letter from Edward C. Walthall (Washington, D. C.) to Belmont Perry (Woodberry, New Jersey), regarding a photograph of General Patton Anderson. Walthall was a general in the Confederate States Army - January 10, 1893. January 10, 1893. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbvf-cor.
APA, 6th edition
Walthall, Edward C. (Edward Cary), 1831-1898. (January 10, 1893)[Letter from Edward C. Walthall (Washington, D. C.) to Belmont Perry (Woodberry, New Jersey), regarding a photograph of General Patton Anderson. Walthall was a general in the Confederate States Army - January 10, 1893]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbvf-cor.
Chicago
Walthall, Edward C. (Edward Cary), 1831-1898, Letter from Edward C. Walthall (Washington, D. C.) to Belmont Perry (Woodberry, New Jersey), regarding a photograph of General Patton Anderson. Walthall was a general in the Confederate States Army - January 10, 1893, January 10, 1893, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/5977sqvbvf-cor.