Gaya APA

Porter, Michael E.. (1980). Competitive Strategy: Techniques for Analyzing Industries and Competitors . New York: The Free Press.

Gaya Chicago

Porter, Michael E.. Competitive Strategy: Techniques for Analyzing Industries and Competitors. New York: The Free Press, 1980. Text.

Gaya MLA

Porter, Michael E.. Competitive Strategy: Techniques for Analyzing Industries and Competitors. New York: The Free Press, 1980. Text.

Gaya Turabian

Porter, Michael E.. Competitive Strategy: Techniques for Analyzing Industries and Competitors. New York: The Free Press, 1980. Print.