Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.