MLA
Ruggles, Daniel, 1810-1897. Letter from Colonel Daniel Ruggles to Colonel R. S. Ganett. Includes note signed by General Robert E. Lee - June 7, 1861. June 5, 1861. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnpv9-cor.
APA, 6th edition
Ruggles, Daniel, 1810-1897. (June 5, 1861)[Letter from Colonel Daniel Ruggles to Colonel R. S. Ganett. Includes note signed by General Robert E. Lee - June 7, 1861]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnpv9-cor.
Chicago
Ruggles, Daniel, 1810-1897, Letter from Colonel Daniel Ruggles to Colonel R. S. Ganett. Includes note signed by General Robert E. Lee - June 7, 1861, June 5, 1861, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/38279cnpv9-cor.