APA Format
World Health Organization (WHO) . (). Nitrates, nitrites and N-nitroso compounds,EHC.05. : Geneva WHO 1977
MLA Format
World Health Organization (WHO) . Nitrates, nitrites and N-nitroso compounds,EHC.05. : Geneva WHO 1977,
Australian/Harvard Format
World Health Organization (WHO) . . Nitrates, nitrites and N-nitroso compounds,EHC.05. Geneva WHO 1977, 
Warning: These citations may not always be 100% accurate.