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