MLA
Wightman, William M. (William May), 1808-1882. Letter from William M. Wightman (Greensboro, Alabama) to Robert Paine (Aberdeen, Mississippi) - April 17, 1860. April 17, 1860. Robert Paine Papers, 1828-1882. Pitts Theology Library. https://digital.library.emory.edu/purl/798mcvdpkd-cor.
APA, 6th edition
Wightman, William M. (William May), 1808-1882. (April 17, 1860)[Letter from William M. Wightman (Greensboro, Alabama) to Robert Paine (Aberdeen, Mississippi) - April 17, 1860]. Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/798mcvdpkd-cor.
Chicago
Wightman, William M. (William May), 1808-1882, Letter from William M. Wightman (Greensboro, Alabama) to Robert Paine (Aberdeen, Mississippi) - April 17, 1860, April 17, 1860, Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/798mcvdpkd-cor.