Cita APA (7a ed.)

Porter, M. E. (1990). The competitive advantage of nations. MacMillan.

Cita Chicago Style (17a ed.)

Porter, Michael E. The Competitive Advantage of Nations. London [etc.]: MacMillan, 1990.

Cita MLA (9a ed.)

Porter, Michael E. The Competitive Advantage of Nations. MacMillan, 1990.