http://es.slideshare.net/JMSU/unilever-2521816

http://clubensayos.com/Negocios/CASO-UNILEVER/327158.html

http://www.markedbyteachers.com/university-degree/european-languages-literature-and-related-subjects/iquest-cu-aacute-les-son-los-actores-y-fuerzas-claves-en-el-entorno-de-marketing-de-la-empresa-que-afectan-a-su-habilidad-para-servir-a-un-p-uacute-blico-objetivo-eficazmente.html

http://www.buenastareas.com/ensayos/Algun-Dia/3522378.html