MLA
Longrace, J. B. Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole. 1865. Pitts Theology Library, Portrait Gallery, Folder I95-001-193. https://digital.library.emory.edu/purl/327mpg4fnw-cor.
APA, 6th edition
Longrace, J. B. (1865). Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole (Portrait Gallery, Folder I95-001-193) [Engravings (prints)]. Pitts Theology Library. https://digital.library.emory.edu/purl/327mpg4fnw-cor.
Chicago
Longrace, J. B. “Engraving of John Wesley, James Hamilton, M.D., and Rev. Joseph Cole.” Engravings (prints). Wesleyana Collection, 1865. Portrait Gallery, Folder I95-001-193. Pitts Theology Library. https://digital.library.emory.edu/purl/327mpg4fnw-cor.