MLA
Everett, Edward, 1794-1865. Letter from Edward Everett (Boston, Massachusetts) to Sarah L. Walden (Providence, Rhode Island) - January 11, 1862. January 11, 1862. Civil War Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5jvd-cor.
APA, 6th edition
Everett, Edward, 1794-1865. (January 11, 1862)[Letter from Edward Everett (Boston, Massachusetts) to Sarah L. Walden (Providence, Rhode Island) - January 11, 1862]. Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5jvd-cor.
Chicago
Everett, Edward, 1794-1865, Letter from Edward Everett (Boston, Massachusetts) to Sarah L. Walden (Providence, Rhode Island) - January 11, 1862, January 11, 1862, Civil War Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5jvd-cor.