Dyfyniad APA

Porter, M. E. (1990). The competitive advantage of nations. Macmillan.

Dyfyniad Arddull Chicago

Porter, Michael E. The Competitive Advantage of Nations. London: Macmillan, 1990.

Dyfyniad MLA

Porter, Michael E. The Competitive Advantage of Nations. Macmillan, 1990.

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