Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.