Cita APA (7a ed.)

Porter, M. E. (1980). Competitive strategy: Techniques for analyzing industries and competitors (1§ edición.). Macmillan.

Cita Chicago Style (17a ed.)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. 1§ edición. New York: Macmillan, 1980.

Cita MLA (8a ed.)

Porter, Michael E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. 1§ edición. Macmillan, 1980.