Dyfyniad APA

(2000). WHO drug information Vol.14.No.4,2000. World Health Organisation.

Dyfyniad Arddull Chicago

WHO Drug Information Vol.14.No.4,2000. Geneva: World Health Organisation, 2000.

Dyfyniad MLA

WHO Drug Information Vol.14.No.4,2000. World Health Organisation, 2000.

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