Porter Michael. (2004). Competitive strategy: Techniques for analyzing industries and competttive. Free Press.
芝加哥风格引文Porter Michael. Competitive Strategy: Techniques for Analyzing Industries and Competttive. New York: Free Press, 2004.
MLA引文Porter Michael. Competitive Strategy: Techniques for Analyzing Industries and Competttive. Free Press, 2004.
警告：这些引文格式不一定是100％准确.