Dyfyniad APA

WHO(world health organization). (2005). Healthy ageing: Practical pointers on keeping well. WHO.

Dyfyniad Arddull Chicago

WHO(world health organization). Healthy Ageing: Practical Pointers on Keeping Well. Geneva: WHO, 2005.

Dyfyniad MLA

WHO(world health organization). Healthy Ageing: Practical Pointers on Keeping Well. WHO, 2005.

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