Dyfyniad APA

Crook. Governing Systems. University of California Press.

Dyfyniad Arddull Chicago

Crook. Governing Systems. University of California Press.

Dyfyniad MLA

Crook. Governing Systems. University of California Press.

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