World Health Organization. (1998). Monitoring ambient air quality for health impact assessment. World Health Organization.
芝加哥风格引文World Health Organization. Monitoring Ambient Air Quality for Health Impact Assessment. Copenhagen: World Health Organization, 1998.
MLA引文World Health Organization. Monitoring Ambient Air Quality for Health Impact Assessment. World Health Organization, 1998.
警告：这些引文格式不一定是100％准确.