Facts on file
Roberts, William J. "Diderot, Denis." France: A Reference Guide from the Renaissance to the Present, European Nations. New York: Facts On File, Inc., 2004. Modern World History Online. Facts On File, Inc. http://www.fofweb.com/activelink2.asp?
ItemID=WE53&iPin=FRA0561&SingleRecord=True (accessed February 25, 2014).
Roberts, William J. "Diderot, Denis." France: A Reference Guide from the Renaissance to the Present, European Nations. New York: Facts On File, Inc., 2004. Modern World History Online. Facts On File, Inc. http://www.fofweb.com/activelink2.asp?
ItemID=WE53&iPin=FRA0561&SingleRecord=True (accessed February 25, 2014).