World Health Organization. (2000). Tools for assessing the O&M status of water supply and sanitation in developing countries. World Health Organization.
芝加哥风格引文World Health Organization. Tools for Assessing the O&M Status of Water Supply and Sanitation in Developing Countries. Geneva: World Health Organization, 2000.
MLA引文World Health Organization. Tools for Assessing the O&M Status of Water Supply and Sanitation in Developing Countries. World Health Organization, 2000.
警告：这些引文格式不一定是100％准确.