Porter. (1985). Competitive advantage: Creating and sustaining superior performance. New York: The Free Press.
Chicago Style CitationPorter. Competitive Advantage: Creating and Sustaining Superior Performance. New York: The Free Press, 1985.
MLA CitationPorter. Competitive Advantage: Creating and Sustaining Superior Performance. New York: The Free Press, 1985.
Warning: These citations may not always be 100% accurate.