MLA
Huntingdon, Selina Hastings, Countess of, 1707-1791. Letter from Selina Hastings Huntingdon to Mr. Carpenter and the Bath Committee, College, October 14, 1791. October 14, 1785. Selina Hastings Letters, 1774-1791, undated. Pitts Theology Library. https://digital.library.emory.edu/purl/4988gthtqk-cor.
APA, 6th edition
Huntingdon, Selina Hastings, Countess of, 1707-1791. (October 14, 1785)[Letter from Selina Hastings Huntingdon to Mr. Carpenter and the Bath Committee, College, October 14, 1791]. Selina Hastings Letters, 1774-1791, undated, Pitts Theology Library. https://digital.library.emory.edu/purl/4988gthtqk-cor.
Chicago
Huntingdon, Selina Hastings, Countess of, 1707-1791, Letter from Selina Hastings Huntingdon to Mr. Carpenter and the Bath Committee, College, October 14, 1791, October 14, 1785, Selina Hastings Letters, 1774-1791, undated, Pitts Theology Library. https://digital.library.emory.edu/purl/4988gthtqk-cor.