Dyfyniad APA

Michael E.Porter. (1998). Competitive Strategy (NA.). A Division of Simon & Schuster, Inc.

Dyfyniad Arddull Chicago

Michael E.Porter. Competitive Strategy. NA. New York: A Division of Simon & Schuster, Inc, 1998.

Dyfyniad MLA

Michael E.Porter. Competitive Strategy. NA. A Division of Simon & Schuster, Inc, 1998.

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