World Health Organization. (2011). Guidelines for drinking-water quality (4th.). World Health Organization.
芝加哥风格引文World Health Organization. Guidelines for Drinking-water Quality. 4th. Geneva, Switzerland: World Health Organization, 2011.
MLA引文World Health Organization. Guidelines for Drinking-water Quality. 4th. World Health Organization, 2011.
警告：这些引文格式不一定是100％准确.