Dyfyniad APA

WHO. (1990). Management of cataract in primary health care services. World Health Organisation.

Dyfyniad Arddull Chicago

WHO. Management of Cataract in Primary Health Care Services. Geneva: World Health Organisation, 1990.

Dyfyniad MLA

WHO. Management of Cataract in Primary Health Care Services. World Health Organisation, 1990.

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