Cita APA

Porter, M. E. 1., & Porter, M. E. 1. (1990). The competitive advantage of nations. New York, New York: Free Press.

Citación estilo Chicago

Porter, Michael E. 1947-, y Michael E. 1947- Porter. The Competitive Advantage of Nations. New York, New York: Free Press, 1990.

Cita MLA

Porter, Michael E. 1947-, y Michael E. 1947- Porter. The Competitive Advantage of Nations. New York, New York: Free Press, 1990.