MLA
Wesley, Sarah, 1759-1828. Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Manchester - October 21, 1796. October 21, 1796. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/4300zpc8ph-cor.
APA, 6th edition
Wesley, Sarah, 1759-1828. (October 21, 1796)[Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Manchester - October 21, 1796]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/4300zpc8ph-cor.
Chicago
Wesley, Sarah, 1759-1828, Letter from Sarah Wesley to Sarah (Gwynne) Wesley, Manchester - October 21, 1796, October 21, 1796, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/4300zpc8ph-cor.