APA Format
World Health Organization (WHO) . (). WHO study group on tobacco product regulation. : Geneva: WHO, 1963
MLA Format
World Health Organization (WHO) . WHO study group on tobacco product regulation. : Geneva: WHO, 1963,
Australian/Harvard Format
World Health Organization (WHO) . . WHO study group on tobacco product regulation. Geneva: WHO, 1963, 
Warning: These citations may not always be 100% accurate.