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Dyfyniad Arddull ChicagoMediaeval Ismaʻili History and Thought. New York: Cambridge University Press, 1996.
Dyfyniad MLAMediaeval Ismaʻili History and Thought. New York: Cambridge University Press, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.