Dyfyniad APA

Lipsey, R. C. (1999). Principles of Economics (1st.). Oxford University Press.

Dyfyniad Arddull Chicago

Lipsey, Richard; Chrystal. Principles of Economics. 1st. Oxford: Oxford University Press, 1999.

Dyfyniad MLA

Lipsey, Richard; Chrystal. Principles of Economics. 1st. Oxford University Press, 1999.

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