1. Allen, R. Missionary Methods: St. Paul’s or Ours. London: Robert Scott, 1912.
2. American Board of Commissioners for Foreign Missions, Zulu Mission: A Condensed Sketch, 1835–1898. Boston: ABCFM, 1898.
3. Anderson, R. Memorial Volume of the First Fifty Years of the American Board of CommissionersforForeign Missions. 5th ed. Boston: ABCFM Missionary House, 1862.
4. Chirenje, J. M. Ethiopianism and Afro-Americans in Southern Africa, 1883–1916. Baton Rouge and London: Louisiana State University Press, 1987.