APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.