World Health Organization. (1996). Management of cataract in primary health care services. World Health Organization.
芝加哥风格引文World Health Organization. Management of Cataract in Primary Health Care Services. Geneva: World Health Organization, 1996.
MLA引文World Health Organization. Management of Cataract in Primary Health Care Services. World Health Organization, 1996.
警告：这些引文格式不一定是100％准确.