APA Format
World Health Organization (WHO) . (). Smoking and its effects on health, TRS.568. : Geneva WHO 1975
MLA Format
World Health Organization (WHO) . Smoking and its effects on health, TRS.568. : Geneva WHO 1975,
Australian/Harvard Format
World Health Organization (WHO) . . Smoking and its effects on health, TRS.568. Geneva WHO 1975, 
Warning: These citations may not always be 100% accurate.