APA Format
World Health Organization (WHO) . (). Techniques for the collection and reporting of data on community water supply, TRS.490. : Geneva WHO 1972
MLA Format
World Health Organization (WHO) . Techniques for the collection and reporting of data on community water supply, TRS.490. : Geneva WHO 1972,
Australian/Harvard Format
World Health Organization (WHO) . . Techniques for the collection and reporting of data on community water supply, TRS.490. Geneva WHO 1972, 
Warning: These citations may not always be 100% accurate.