Porter, M. E. (2004). Competitive Advantage: Creating and Sustaining Superior Performance. Free Press.
Citazione stile Chigago Style (17a edizione)Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. New York: Free Press, 2004.
Citatione MLA (9a ed.)Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. Free Press, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.