MLA
Wesley, Sarah (Gwynne), 1726-1822, Wesley, Charles, 1757-1834. Letter from Charles Wesley junior to Sarah Wesley, London & Letter from Sarah (Gwynne) Wesley - August 1, [No Year]. August 1, year unknown. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/825x69p8x1-cor.
APA, 6th edition
Wesley, Sarah (Gwynne), 1726-1822, & Wesley, Charles, 1757-1834. (August 1, year unknown)[Letter from Charles Wesley junior to Sarah Wesley, London & Letter from Sarah (Gwynne) Wesley - August 1, [No Year]]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/825x69p8x1-cor.
Chicago
Wesley, Sarah (Gwynne), 1726-1822, Wesley, Charles, 1757-1834, Letter from Charles Wesley junior to Sarah Wesley, London & Letter from Sarah (Gwynne) Wesley - August 1, [No Year], August 1, year unknown, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/825x69p8x1-cor.