Cita APA

Porter, M. E. (1980). Competitive strategy: Techniques for analyzing industries and competitors. New York ; London: Free Press.

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.