APA (7th ed.) Citation

Porter, M. E. (1985). Competitive advantage: Creating and sustaining superior performance. Free Press Collier Macmillan.

Chicago Style (17th ed.) Citation

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. New York, London: Free Press Collier Macmillan, 1985.

MLA (9th ed.) Citation

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. Free Press Collier Macmillan, 1985.