एपीए उद्धरण

Porter, M. E. (1990). The competitive advantage of nations. Macmillan.

शिकागो स्टाइल उद्धरण

Porter, Michael E. The Competitive Advantage of Nations. London: Macmillan, 1990.

एमएलए उद्धरण

Porter, Michael E. The Competitive Advantage of Nations. Macmillan, 1990.