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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.