MLA
Doggett, D. S. (David Seth), 1810-1880. Letter from D. S. Doggett (Williamsburg, Virginia) to Robert Paine (Aberdeen, Mississippi) - February 21, 1861. February 21, 1861. Robert Paine Papers, 1828-1882. Pitts Theology Library. https://digital.library.emory.edu/purl/525k98sgdc-cor.
APA, 6th edition
Doggett, D. S. (David Seth), 1810-1880. (February 21, 1861)[Letter from D. S. Doggett (Williamsburg, Virginia) to Robert Paine (Aberdeen, Mississippi) - February 21, 1861]. Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/525k98sgdc-cor.
Chicago
Doggett, D. S. (David Seth), 1810-1880, Letter from D. S. Doggett (Williamsburg, Virginia) to Robert Paine (Aberdeen, Mississippi) - February 21, 1861, February 21, 1861, Robert Paine Papers, 1828-1882, Pitts Theology Library. https://digital.library.emory.edu/purl/525k98sgdc-cor.