APA
World Health Organization & Food and Agriculture Organization, . (1991). Toxicological evalution of certain veterinary drug residues in food. World Health Organization, Geneva: .
Chicago
World Health Organization & Food and Agriculture Organization, . 1991. Toxicological evalution of certain veterinary drug residues in food. World Health Organization, Geneva: .
Harvard
World Health Organization & Food and Agriculture Organization, . (1991). Toxicological evalution of certain veterinary drug residues in food. World Health Organization, Geneva: .
MLA
World Health Organization & Food and Agriculture Organization, . Toxicological evalution of certain veterinary drug residues in food. World Health Organization, Geneva: . 1991.