Cita APA (7th ed.)

Porter, M. E. (2004). Competitive Advantage: Creating and Sustaining Superior Performance. Free Press.

Cita Chicago (17th ed.)

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. New York: Free Press, 2004.

Cita MLA (9th ed.)

Porter, Michael E. Competitive Advantage: Creating and Sustaining Superior Performance. Free Press, 2004.