Porter, M. E. (1980). Competitive strategy: Techniques for analyzing industries and competitors /Michael E. Porter. The Free Press.
Cita Chicago Style (17a ed.)Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors /Michael E. Porter. New York: The Free Press, 1980.
Cita MLA (9a ed.)Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors /Michael E. Porter. The Free Press, 1980.
Precaución: Estas citas no son 100% exactas.