APA Format
World Health Organization (WHO) . (). Nonproprietary names for pharmaceutical substances, TRS.581. : Geneva WHO 1975
MLA Format
World Health Organization (WHO) . Nonproprietary names for pharmaceutical substances, TRS.581. : Geneva WHO 1975,
Australian/Harvard Format
World Health Organization (WHO) . . Nonproprietary names for pharmaceutical substances, TRS.581. Geneva WHO 1975, 
Warning: These citations may not always be 100% accurate.