PORTER MICHAEL E. (1980). COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING INDUSTRIES AND COMPETITORS. FREE PRESS.
芝加哥风格引文PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING INDUSTRIES AND COMPETITORS. LONDON NEW YORK: FREE PRESS, 1980.
MLA引文PORTER MICHAEL E. COMPETITIVE STRATEGY: TECHNIQUES FOR ANALYSING INDUSTRIES AND COMPETITORS. FREE PRESS, 1980.
警告：这些引文格式不一定是100％准确.