MLA
Brady, Mathew B., approximately 1823-1896. Union officer Elmer Ephraim Ellsworth. Ellsworth was the first Union officer to due in the Civil War. 1861?/1880?. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnq8z-cor.
APA, 6th edition
Brady, Mathew B., approximately 1823-1896. (1861?/1880?)[Union officer Elmer Ephraim Ellsworth. Ellsworth was the first Union officer to due in the Civil War]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnq8z-cor.
Chicago
Brady, Mathew B., approximately 1823-1896, Union officer Elmer Ephraim Ellsworth. Ellsworth was the first Union officer to due in the Civil War, 1861?/1880?, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnq8z-cor.