MLA
Wesley, John, 1703-1791. Letter from John Wesley to Ellen Gretton Christian, Lambeth - February 12, 1782. February 12, 1782. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/491fj6q5qh-cor.
APA, 6th edition
Wesley, John, 1703-1791. (February 12, 1782)[Letter from John Wesley to Ellen Gretton Christian, Lambeth - February 12, 1782]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/491fj6q5qh-cor.
Chicago
Wesley, John, 1703-1791, Letter from John Wesley to Ellen Gretton Christian, Lambeth - February 12, 1782, February 12, 1782, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/491fj6q5qh-cor.