APA (7th ed.) Citation

Porter, M. E. (1990). The competitive advantage of nations: With a new ontroduction. The Free Press.

Chicago Style (17th ed.) Citation

Porter, Michael E. The Competitive Advantage of Nations: With a New Ontroduction. New York: The Free Press, 1990.

MLA (8th ed.) Citation

Porter, Michael E. The Competitive Advantage of Nations: With a New Ontroduction. The Free Press, 1990.