APA
World Health Organization, . (1991). Evaluation of certain veterinary drug residues in food : 38 …. World Health Organization, Geneva: .
Chicago
World Health Organization, . 1991. Evaluation of certain veterinary drug residues in food : 38 …. World Health Organization, Geneva: .
Harvard
World Health Organization, . (1991). Evaluation of certain veterinary drug residues in food : 38 …. World Health Organization, Geneva: .
MLA
World Health Organization, . Evaluation of certain veterinary drug residues in food : 38 …. World Health Organization, Geneva: . 1991.