Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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