APA aipamena

Bergesen,Albert. (1983). Crisis in the world system. Sage Publications.

Chicago Style aipamena

Bergesen,Albert. Crisis in the World System. London: Sage Publications, 1983.

MLA aipamena

Bergesen,Albert. Crisis in the World System. Sage Publications, 1983.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.