APA Format
World Health Organization (WHO) . (). Community water supply: report of a WHO expert committee. : Geneva WHO 1969
MLA Format
World Health Organization (WHO) . Community water supply: report of a WHO expert committee. : Geneva WHO 1969,
Australian/Harvard Format
World Health Organization (WHO) . . Community water supply: report of a WHO expert committee. Geneva WHO 1969, 
Warning: These citations may not always be 100% accurate.