MLA
Longacre, J. B. Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole. 1870. Pitts Theology Library, Box 40, Folder I95-001-164. https://digital.library.emory.edu/purl/85370rxx0f-cor.
APA, 6th edition
Longacre, J. B. (1870). Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole (Box 40, Folder I95-001-164) [Engravings (prints)]. Pitts Theology Library. https://digital.library.emory.edu/purl/85370rxx0f-cor.
Chicago
Longacre, J. B. “Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole.” Engravings (prints). Wesleyana Collection, 1870. Box 40, Folder I95-001-164. Pitts Theology Library. https://digital.library.emory.edu/purl/85370rxx0f-cor.