Dyfyniad APA

(1987). WHO expert committee on biological standardization. World Health Organization.

Dyfyniad Arddull Chicago

WHO Expert Committee on Biological Standardization. Geneva: World Health Organization, 1987.

Dyfyniad MLA

WHO Expert Committee on Biological Standardization. World Health Organization, 1987.

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