MLA
Mosby, John Singleton, 1833-1916. Letter from John Singleton Mosby (Baltimore, Maryland) to [?] Early, recommending Martin Maddox as a landlord - November 16, 1867. November 16, 1867. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p3qc-cor.
APA, 6th edition
Mosby, John Singleton, 1833-1916. (November 16, 1867)[Letter from John Singleton Mosby (Baltimore, Maryland) to [?] Early, recommending Martin Maddox as a landlord - November 16, 1867]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p3qc-cor.
Chicago
Mosby, John Singleton, 1833-1916, Letter from John Singleton Mosby (Baltimore, Maryland) to [?] Early, recommending Martin Maddox as a landlord - November 16, 1867, November 16, 1867, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/344pk0p3qc-cor.