Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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