Cita APA (7a ed.)

Porter Michael. (2004). Competitive strategy: Techniques for analyzing industries and competttive. Free Press.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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