linkcografia
1._https://www.google.com.ec/?gfe_rd=cr&ei=nyl-U46vHO2lsQfWkICYBg#q=google+academico
2._https://www.google.com.ec/search?q=slideshare&source=lnms&tbm=isch&sa=X&ei=Nyp-U6O9CY7hsASf5IGQDg&sqi=2&ved=0CAYQ_AUoAQ&biw=1215&bih=710#facrc=_&imgdii=_&imgrc=Cwzwynip6gtoZM%253A%3BMhNHwPAmxyVD0M%3Bhttp%253A%252F%252Fwww.handplantmedia.com%252Fwp-content%252Fuploads%252F2014%252F03%252Fslideshare-800x531.jpg%3Bhttp%253A%252F%252Fwww.handplantmedia.com%252Fslideshare%252F%3B800%3B531
