Citazione Stile APA (7a Edizione)

Porter Michael E. (1980). Competitve Strategy: Techniques for Analyzing Industries and Competitors. Free Press.

Citazione stile Chigago Style (17a edizione)

Porter Michael E. Competitve Strategy: Techniques for Analyzing Industries and Competitors. New York: Free Press, 1980.

Citatione MLA (9a ed.)

Porter Michael E. Competitve Strategy: Techniques for Analyzing Industries and Competitors. Free Press, 1980.