MLA
Washburn, Henry Stevenson, 1813-1903, Root, George F. (George Frederick), 1820-1895. Vacant Chair. 1861. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mxbr-cor.
APA, 6th edition
Washburn, Henry Stevenson, 1813-1903, & Root, George F. (George Frederick), 1820-1895. (1861)[Vacant Chair]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mxbr-cor.
Chicago
Washburn, Henry Stevenson, 1813-1903, Root, George F. (George Frederick), 1820-1895, Vacant Chair, 1861, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mxbr-cor.