Tobin Siebers, "Religion and the Authority of the Past", University of Michigan Press, November 1, 1993 (ISBN 0-472-08259-0). Jonathan Berkey, "The Formation of Islam", Cambridge University Press, January 1, 2003 (ISBN 0-521-58813-8). Goddard, Hugh Goddard, "Christians and Muslims: from double standards to mutual understanding", Routledge (UK), October 26, 1995 (ISBN 0-7007-0364-0).