Dyfyniad APA

World Health Organization. (2001). WHO drug information. World Health Organization.

Dyfyniad Arddull Chicago

World Health Organization. WHO Drug Information. Geneva: World Health Organization, 2001.

Dyfyniad MLA

World Health Organization. WHO Drug Information. World Health Organization, 2001.

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