All source's sited
1.)"Leonardo Da Vinci." Biography for Kids: Artist, Genius, Inventor. N.p., n.d. Web. 13 Feb. 2014.
Website
1.) Renaissance and Reformation: A.D. 1350-1600. Washington, D.C.: National Geographic Society, 2005. Print.
Book
1.) The World Book Encyclopedia. Chicago: World Book, 2002. Print.
1.)"Leonardo Da Vinci." Biography for Kids: Artist, Genius, Inventor. N.p., n.d. Web. 13 Feb. 2014.
Website
1.) Renaissance and Reformation: A.D. 1350-1600. Washington, D.C.: National Geographic Society, 2005. Print.
Book
1.) The World Book Encyclopedia. Chicago: World Book, 2002. Print.