MLA
Ewell, Richard Stoddert, 1817-1872. Telegram from Brigadier General Richard S. Ewell to Brigadier General Daniel Ruggles - August 17, 1863. August 17, 1863. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3655dv42b4-cor.
APA, 6th edition
Ewell, Richard Stoddert, 1817-1872. (August 17, 1863)[Telegram from Brigadier General Richard S. Ewell to Brigadier General Daniel Ruggles - August 17, 1863]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3655dv42b4-cor.
Chicago
Ewell, Richard Stoddert, 1817-1872, Telegram from Brigadier General Richard S. Ewell to Brigadier General Daniel Ruggles - August 17, 1863, August 17, 1863, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3655dv42b4-cor.