APA استشهاد

Porter,Michael E. (1998). The competitive advantage of nations: With a new introduction. Mac Millan.

استشهاد بنمط شيكاغو

Porter,Michael E. The Competitive Advantage of Nations: With a New Introduction. London: Mac Millan, 1998.

MLA استشهاد

Porter,Michael E. The Competitive Advantage of Nations: With a New Introduction. Mac Millan, 1998.