There are two significant English language encyclopedias which have entries describing the life and ideas of the eighth Shia Imam, Reza (AS): The encyclopedia Americana and The Encyclopaedia of Islam.
The Encyclopedia Americana which is the most ancient English-language encyclopedia in the world features four entries which have sections on Imam Reza (AS) and The Encyclopaedia of Islam which comprises an article about the eight Shia Imam.
The article in the Encyclopaedia of Islam was written by the prominent American-British scholar Bernard Lewis, who is the Professor Emeritus of Near Eastern Studies at Princeton University. Mr. Lewis is an scholar of Islamic history, particularly his expertize is on the interaction between Islam and the West.
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