http://www.redalyc.org/pdf/487/48721182006.pdf
http://www.redalyc.org/pdf/487/48721182006.pdf
http://books.google.es/books?hl=es&lr=&id=AboiQRDrB4QC&oi=fnd&pg=PA13&dq=redes+sociales+y+su+impacto+en+las+empresas&ots=FK4nCu6xU_&sig=_yPM1OusG6kbGIU0KbT-iahwehc#v=onepage&q=redes%20sociales%20y%20su%20impacto%20en%20las%20empresas&f=false
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