APA aipamena

Siebert,Horst. (1999). The world economy. Routledge.

Chicago Style aipamena

Siebert,Horst. The World Economy. London: Routledge, 1999.

MLA aipamena

Siebert,Horst. The World Economy. Routledge, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.