APA引文

PORTER MICHAEL E. (1980). COMPETITIVE STRATEGY TECHNIQUES. FREE PRESS.

芝加哥风格引文

PORTER MICHAEL E. COMPETITIVE STRATEGY TECHNIQUES. LONDON: FREE PRESS, 1980.

MLA引文

PORTER MICHAEL E. COMPETITIVE STRATEGY TECHNIQUES. FREE PRESS, 1980.

警告：这些引文格式不一定是100％准确.