Rene Descartes

My Sources

Book/Encyclopdia

Wadier, Steven. "Rene Descartes". World Book. 2007.

Website

O'Conner, J J; Robertson, E F. "Rene Descartes". MacTutor. December 1997. 5 May, 2009
                  <http://www.gap-system.org/~history/Biographies/Descartes.html>