Dyfyniad APA

Gallup Poll Tuesday Briefing. Gallup Poll News Service.

Dyfyniad Arddull Chicago

Gallup Poll Tuesday Briefing. Gallup Poll News Service.

Dyfyniad MLA

Gallup Poll Tuesday Briefing. Gallup Poll News Service.

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