Cita APA (7a ed.)

Porter, M. E. (1990). The competitive advantange of nations. Macmillan.

Cita Chicago Style (17a ed.)

Porter, Michael E. The Competitive Advantange of Nations. London: Macmillan, 1990.

Cita MLA (8a ed.)

Porter, Michael E. The Competitive Advantange of Nations. Macmillan, 1990.