Spiess, E. (1874). Comparative Study of Religions and its Importance for Christianity: A Paper Read before teh General Conference of the Evangelical Alliance New York, October 6, 1873. : Fromann.
Chicago-referens (17:e uppl.)Spiess, Edmund. Comparative Study of Religions and Its Importance for Christianity: A Paper Read Before Teh General Conference of the Evangelical Alliance New York, October 6, 1873. Jena: : Fromann, 1874.
MLA-referens (8:e uppl.)Spiess, Edmund. Comparative Study of Religions and Its Importance for Christianity: A Paper Read Before Teh General Conference of the Evangelical Alliance New York, October 6, 1873. : Fromann, 1874.
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