APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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