United Nations Human Settlements Programme. (2006). Meeting development goals in small urban centres: Water and sanitation in the world's cities, 2006. Earthscan.
芝加哥风格引文United Nations Human Settlements Programme. Meeting Development Goals in Small Urban Centres: Water and Sanitation in the World's Cities, 2006. London: Earthscan, 2006.
MLA引文United Nations Human Settlements Programme. Meeting Development Goals in Small Urban Centres: Water and Sanitation in the World's Cities, 2006. Earthscan, 2006.
警告：这些引文格式不一定是100％准确.