APA Format
World Health Organization (WHO) . (). Assessment of public health and social problems associated with the use of psychotropic drugs, TRS.656. : Geneva WHO 1981
MLA Format
World Health Organization (WHO) . Assessment of public health and social problems associated with the use of psychotropic drugs, TRS.656. : Geneva WHO 1981,
Australian/Harvard Format
World Health Organization (WHO) . . Assessment of public health and social problems associated with the use of psychotropic drugs, TRS.656. Geneva WHO 1981, 
Warning: These citations may not always be 100% accurate.