Dyfyniad APA

Enviornmental reporter. 1990. Federal minister for the enviornment.

Dyfyniad Arddull Chicago

Enviornmental Reporter. 1990. Federal minister for the enviornment.

Dyfyniad MLA

Enviornmental Reporter. 1990. Federal minister for the enviornment.

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