Citazione Stile APA (7a Edizione)

Porter, M. E. (2004). Competitive Strategy: Techniques for Analyzing Industries and Competitors. Free Press.

Citazione stile Chigago Style (17a edizione)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. New York.: Free Press, 2004.

Citatione MLA (9a ed.)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. Free Press, 2004.