APA
World Health Organization, . (1993). Methyl parathion. World Health Organization, Geneva: .
Chicago
World Health Organization, . 1993. Methyl parathion. World Health Organization, Geneva: .
Harvard
World Health Organization, . (1993). Methyl parathion. World Health Organization, Geneva: .
MLA
World Health Organization, . Methyl parathion. World Health Organization, Geneva: . 1993.