Dyfyniad APA

World Health Organization. (2000). Healthy ageing development. World Health Organization.

Dyfyniad Arddull Chicago

World Health Organization. Healthy Ageing Development. Geneva: World Health Organization, 2000.

Dyfyniad MLA

World Health Organization. Healthy Ageing Development. World Health Organization, 2000.

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