Vídeo Redes Sociais

http://www.youtube.com/watch?v=xAZnsG2sKYE

https://www.youtube.com/watch?v=xEZjXjl6EJ8


https://www.youtube.com/watch?v=uRA16Y1xeTE


http://pt.slideshare.net/sfsato/entendendo-as-geraes-x-e-y-8308439