APA引文

Porter, M. E. (1980). Competitive strategy: Techniques for analyzing industries and competitors. New York: Free Press.

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.