World Health Organization. (2012). Water safety planning for small community water supplies: Step-by-step risk management guidance for drinking water supplies in small communities. World Health Organization.
芝加哥风格引文World Health Organization. Water Safety Planning for Small Community Water Supplies: Step-by-step Risk Management Guidance for Drinking Water Supplies in Small Communities. Geneva, Switzerland: World Health Organization, 2012.
MLA引文World Health Organization. Water Safety Planning for Small Community Water Supplies: Step-by-step Risk Management Guidance for Drinking Water Supplies in Small Communities. World Health Organization, 2012.
警告：这些引文格式不一定是100％准确.