MLA
Northrop, Lucius Bellinger, 1811-1894. Telegram from Lucius Bellinger Northrop to Brigadier General Daniel Ruggles - September 28, 1862. September 28, 1862. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx96m2-cor.
APA, 6th edition
Northrop, Lucius Bellinger, 1811-1894. (September 28, 1862)[Telegram from Lucius Bellinger Northrop to Brigadier General Daniel Ruggles - September 28, 1862]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx96m2-cor.
Chicago
Northrop, Lucius Bellinger, 1811-1894, Telegram from Lucius Bellinger Northrop to Brigadier General Daniel Ruggles - September 28, 1862, September 28, 1862, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8773tx96m2-cor.