مراجع بیگانه:
۱- Ropertson: Pagan Christs.
۲- Berry: Religions of the World.
۳- Berry: A History of Freedom of Thought.
۴- Pflederer: The Early Christian Conception of Christ.
۵- T.W. Doane: Bible Mythology.
۶- Harnak: What is Christianity.
۷- Encyclopedia of Religion and Ethics.
۸- Khwaja kamaluddin: the sources of Christianity.