WHO. International digest of health legislation: Vol.44(4)/1993. Geneva: WHO.
Trích dẫn kiểu ChicagoWHO. International Digest of Health Legislation: Vol.44(4)/1993. Geneva: WHO.
MLA引文WHO. International Digest of Health Legislation: Vol.44(4)/1993. Geneva: WHO.
警告：这些引文格式不一定是100％准确.