MLA
Wesley, Sarah, 1759-1828. Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Reading - November 9, 1789. November 9, 1789. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/9010p2nh03-cor.
APA, 6th edition
Wesley, Sarah, 1759-1828. (November 9, 1789)[Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Reading - November 9, 1789]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/9010p2nh03-cor.
Chicago
Wesley, Sarah, 1759-1828, Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Reading - November 9, 1789, November 9, 1789, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/9010p2nh03-cor.