MLA
Wesley, John, 1703-1791. Circular letter from John Wesley to "Dr. Coke, Mr. Asbury, and our Brethren in North America," Bristol - September 10, 1784. September 10, 1784. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/197xksn0m8-cor.
APA, 6th edition
Wesley, John, 1703-1791. (September 10, 1784)[Circular letter from John Wesley to "Dr. Coke, Mr. Asbury, and our Brethren in North America," Bristol - September 10, 1784]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/197xksn0m8-cor.
Chicago
Wesley, John, 1703-1791, Circular letter from John Wesley to "Dr. Coke, Mr. Asbury, and our Brethren in North America," Bristol - September 10, 1784, September 10, 1784, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/197xksn0m8-cor.