UNICEF & Bellamy, C. (2001). The state of the world's children 2001: Early childhood. UNICEF.
芝加哥风格引文UNICEF 与 Carol Bellamy. The State of the World's Children 2001: Early Childhood. New York: UNICEF, 2001.
MLA引文UNICEF 与 Carol Bellamy. The State of the World's Children 2001: Early Childhood. UNICEF, 2001.
警告：这些引文格式不一定是100％准确.