MLA
Kavanaugh, H. H. (Hubbard Hinde), 1802-1884. Letter from H. H. Kavanaugh (Nashville, Tennessee) to Robert Paine - November 16, 1859. November 16, 1859. Robert Paine Papers, 1828-1882. Pitts Theology Library. https://digital.library.emory.edu/purl/136h189465-cor.
APA, 6th edition
Kavanaugh, H. H. (Hubbard Hinde), 1802-1884. (November 16, 1859)[Letter from H. H. Kavanaugh (Nashville, Tennessee) to Robert Paine - November 16, 1859]. Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/136h189465-cor.
Chicago
Kavanaugh, H. H. (Hubbard Hinde), 1802-1884, Letter from H. H. Kavanaugh (Nashville, Tennessee) to Robert Paine - November 16, 1859, November 16, 1859, Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/136h189465-cor.