एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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