Porter, M. E. (1998). The competitive advantage of nations: With a new introduction. New York: Free Press.
استشهاد بنمط شيكاغوPorter, Michael E. The Competitive Advantage of Nations: With a New Introduction. New York: Free Press, 1998.
MLA استشهادPorter, Michael E. The Competitive Advantage of Nations: With a New Introduction. New York: Free Press, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.