PORTER MICHAEL E. (1983). CASES IN COMPETITIVE STRATEGY. FREE PRESS.
芝加哥风格引文PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. NEW YORK LONDON: FREE PRESS, 1983.
MLA引文PORTER MICHAEL E. CASES IN COMPETITIVE STRATEGY. FREE PRESS, 1983.
警告：这些引文格式不一定是100％准确.