APA Format
World Health Organization (WHO) . (). Promotion of medical practitioners interest in preventive medicine, TRS.269. : Geneva WHO 1964
MLA Format
World Health Organization (WHO) . Promotion of medical practitioners interest in preventive medicine, TRS.269. : Geneva WHO 1964,
Australian/Harvard Format
World Health Organization (WHO) . . Promotion of medical practitioners interest in preventive medicine, TRS.269. Geneva WHO 1964, 
Warning: These citations may not always be 100% accurate.