MLA
Washington, George, 1732-1799. The diary of George Washington, from 1789 to 1791 : embracing the opening of the first Congress, and his tours through New England, Long Island, and the Southern States : together with his journal of a tour to the Ohio, in 1753. 1861. Civil War Imprints. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/726xwdbwf9-cor.
APA, 6th edition
Washington, George, 1732-1799. (1861)[The diary of George Washington, from 1789 to 1791 : embracing the opening of the first Congress, and his tours through New England, Long Island, and the Southern States : together with his journal of a tour to the Ohio, in 1753]. Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/726xwdbwf9-cor.
Chicago
Washington, George, 1732-1799, The diary of George Washington, from 1789 to 1791 : embracing the opening of the first Congress, and his tours through New England, Long Island, and the Southern States : together with his journal of a tour to the Ohio, in 1753, 1861, Civil War Imprints, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/726xwdbwf9-cor.