APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

PORTER. Competitive Advantage: Creating and Sustaining Superior Performance, with a New Introduction. New York, USA: The Free Press, 1998.

MLA (9th ed.) Citation

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