imagenes

https://www.google.cl/search?q=prospectiva&tbm=isch&tbo=u&source=univ&sa=X&ei=DgMFUtixGcLtiwLJ_oG4Dg&sqi=2&ved=0CEUQsAQ&biw=1366&bih=667

slide

http://www.slideshare.net/myriam410/prospectiva-presentation-875573

prospectare

http://www.degerencia.com/articulo/que-es-prospectiva