| G.D. Henderson, Expository Times 41 (1929-30): 487-491. | |
| J.C. O'Neill, "Adolf von Harnack and the Entry of the German State into War, July-August 1914," Scottish Journal of Theology 55.1 (2002): 1-18. | |
| Wilhelm Pauck, Harnack and Troeltsch: Two Historical Theologians. New York: Oxford University Press, 1968. Hbk. ISBN: 0196316960. pp.142. | |
| Martin Rumscheidt, ed., Adolf Von Harnack. Edinburgh: Continuum International Publishing Group - T & T Clark, 1988. Pbk. ISBN: 0005991307. pp.352. {Amazon.com} | |
| Agnes von Zahn-Harnack, Adolf von Harnack. Berlin : Walter de Gruyter, 1951. pp. xiii + 451. |
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