MLA
Chalmers, James R. (James Ronald), 1831-1898. Telegram from Brigadier General James R. Chalmers to Major General G. Garner - March 15, 1862. March 15, 1862. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jxj0-cor.
APA, 6th edition
Chalmers, James R. (James Ronald), 1831-1898. (March 15, 1862)[Telegram from Brigadier General James R. Chalmers to Major General G. Garner - March 15, 1862]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jxj0-cor.
Chicago
Chalmers, James R. (James Ronald), 1831-1898, Telegram from Brigadier General James R. Chalmers to Major General G. Garner - March 15, 1862, March 15, 1862, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6451g1jxj0-cor.