APA aipamena

PORTER, M. E. (1990). The Competitive Advantage On Nations. the Free Press.

Chicago Style aipamena

PORTER, Michael E. The Competitive Advantage On Nations. the Free Press, 1990.

MLA aipamena

PORTER, Michael E. The Competitive Advantage On Nations. the Free Press, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.