http://www.esolcourses.com/content/topics/black-history/rosa-parks/listening.html
http://www.breakingnewsenglish.com/0510/051026-rosa_parks-e.html
http://www.breakingnewsenglish.com/0510/051026-rosa_parks-e.mp3
http://www.pbslearningmedia.org/resource/iml04.soc.ush.civil.parks/rosa-parks/?utm_source=facebook&utm_medium=social&utm_campaign=mktg2015
http://www.lavanguardia.com/hemeroteca/20151130/30489273799/rosa-parks-derechos-civiles-estados-unidos-discriminacion-racial-racismo.html