Joint WHO/UNICEF Nutrition Support Programme. (1989). Nutrition learning packages. World Health Organization.
芝加哥风格引文Joint WHO/UNICEF Nutrition Support Programme. Nutrition Learning Packages. Geneva: World Health Organization, 1989.
MLA引文Joint WHO/UNICEF Nutrition Support Programme. Nutrition Learning Packages. World Health Organization, 1989.
警告：这些引文格式不一定是100％准确.