Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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