APA aipamena

Lipsey Richard. (2011). Economics (dom 13th.). Oxford University Press.

Chicago Style aipamena

Lipsey Richard. Economics. dom 13th. United King: Oxford University Press, 2011.

MLA aipamena

Lipsey Richard. Economics. dom 13th. Oxford University Press, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.