Cita APA (7a ed.)

Porter, M. E. (1998). Competitive strategy: Techniques for analyzing industries and competitors : with a new introduction (1st Free Press ed.). Free Press.

Cita Chicago Style (17a ed.)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors : With a New Introduction. 1st Free Press ed. New York: Free Press, 1998.

Cita MLA (8a ed.)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors : With a New Introduction. 1st Free Press ed. Free Press, 1998.