APA
World Health Organization, . (1991). Insect and rodent control through environmental management. World Health Organization, Geneva: .
Chicago
World Health Organization, . 1991. Insect and rodent control through environmental management. World Health Organization, Geneva: .
Harvard
World Health Organization, . (1991). Insect and rodent control through environmental management. World Health Organization, Geneva: .
MLA
World Health Organization, . Insect and rodent control through environmental management. World Health Organization, Geneva: . 1991.