Dyfyniad APA

Kling. Policy and Choice. Brookings Institution Press.

Dyfyniad Arddull Chicago

Kling. Policy and Choice. Brookings Institution Press.

Dyfyniad MLA

Kling. Policy and Choice. Brookings Institution Press.

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