Section: Articles Title: The Five competitive forces that shape strategy / Michael E. PorterAuthor: Porter, Michael E. Related records: En: Harvard business review. - Boston : Impact Media Comercial S.A., 1988-. - 28/05/2012 Tomo 90 Número Especial - 2012 Other categories: 92 Rights: In Copyright (InC) Referencias externas: earth MÁS INFORMACIÓN See issue detail