MLA
Huntingdon, Selina Hastings, Countess of, 1707-1791. Selina Hastings Letters, 1774-1791, undated. Pitts Theology Library. https://digital.library.emory.edu/purl/880ht76hzh-cor.
APA, 6th edition
Huntingdon, Selina Hastings, Countess of, 1707-1791. [Selina Hastings Letters, 1774-1791, undated]. Pitts Theology Library. https://digital.library.emory.edu/purl/880ht76hzh-cor.
Chicago
Huntingdon, Selina Hastings, Countess of, 1707-1791, Selina Hastings Letters, 1774-1791, undated, Pitts Theology Library. https://digital.library.emory.edu/purl/880ht76hzh-cor.