MLA
Capers, William, 1790-1855. Letter from William Capers (Charleston, South Carolina) to Robert Paine - April 25, 1849. April 25, 1849. Robert Paine Papers, 1828-1882. Pitts Theology Library. https://digital.library.emory.edu/purl/38279cnq8k-cor.
APA, 6th edition
Capers, William, 1790-1855. (April 25, 1849)[Letter from William Capers (Charleston, South Carolina) to Robert Paine - April 25, 1849]. Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/38279cnq8k-cor.
Chicago
Capers, William, 1790-1855, Letter from William Capers (Charleston, South Carolina) to Robert Paine - April 25, 1849, April 25, 1849, Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/38279cnq8k-cor.