APA
World Health Organization, . (1990). Evaluation of certain veterinary drug residues in food. WHO, Geneva: .
Chicago
World Health Organization, . 1990. Evaluation of certain veterinary drug residues in food. WHO, Geneva: .
Harvard
World Health Organization, . (1990). Evaluation of certain veterinary drug residues in food. WHO, Geneva: .
MLA
World Health Organization, . Evaluation of certain veterinary drug residues in food. WHO, Geneva: . 1990.