APA引文

World Health Organisation. (1989). Health of the elderly World Health organisation. World Health Organisation.

Chicago Edition Citation

World Health Organisation. Health of the Elderly World Health Organisation. Geneva: World Health Organisation, 1989.

MLA引文

World Health Organisation. Health of the Elderly World Health Organisation. World Health Organisation, 1989.

警告：這些引文格式不一定是100％准確.