Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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