United nations. (2001). Water conservation: A Guide to promoting public awareness. UN.
Чикаго маягийн жагсаалтUnited nations. Water Conservation: A Guide to Promoting Public Awareness. Bangkok: UN, 2001.
MLA ишлэлUnited nations. Water Conservation: A Guide to Promoting Public Awareness. UN, 2001.
Warning: These citations may not always be 100% accurate.