APA (7th ed.) Citation

Porter, M. E. (1998). Competitive advantage: Creating and sustaining superior performance:with a new introduction. The Free Press.

Chicago Style (17th ed.) Citation

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance:with a New Introduction. New York: The Free Press, 1998.

MLA (9th ed.) Citation

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance:with a New Introduction. The Free Press, 1998.