LIBROS:http://books.google.com.co/books?id=J6OTlHYpkm0C&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=pjPrpCMkgOsC&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=6V-K4XonzQoC&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=WECofTOdFJAC&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=qNbh64WGU7EC&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=1KBMPyokxa8C&printsec=frontcover&hl=es#v=onepage&q&f=falsehttp://books.google.com.co/books?id=kX_Ke3_biKIC&printsec=frontcover&hl=es#v=onepage&q&f=falsePORTALES:http://www.colombiaaprende.edu.co/html/home/1592/w3-channel.htmlhttp://www.eduteka.org/http://www.uhu.es/cine.educacion/VIDEOS:https://youtu.be/meLXFLl1FE8https://youtu.be/S1MR0toLov4https://youtu.be/XraE9GmUNgUhttps://youtu.be/iKQgdreJ5L4https://youtu.be/ZW9D-sOhE0Ehttps://youtu.be/-1Y9OqSJKCchttps://youtu.be/9MmPr79sRughttps://youtu.be/wHWymBgOcC8