MLA
Wesley, John, 1703-1791. The principles of a Methodist farther explain'd: : occasioned by the Reverend Mr. Church's Second letter to Mr. Wesley: in a second letter to that gentleman.. 1746. Wesleyana Collection. Pitts Theology Library. https://digital.library.emory.edu/purl/3074tmphz8-cor.
APA, 6th edition
Wesley, John, 1703-1791. (1746)[The principles of a Methodist farther explain'd: : occasioned by the Reverend Mr. Church's Second letter to Mr. Wesley: in a second letter to that gentleman.]. Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/3074tmphz8-cor.
Chicago
Wesley, John, 1703-1791, The principles of a Methodist farther explain'd: : occasioned by the Reverend Mr. Church's Second letter to Mr. Wesley: in a second letter to that gentleman., 1746, Wesleyana Collection, Pitts Theology Library. https://digital.library.emory.edu/purl/3074tmphz8-cor.