APA
World Health Organization, . (1988). Ethical criteria for medicinal drug promotion. World Health Organization, Geneva: .
Chicago
World Health Organization, . 1988. Ethical criteria for medicinal drug promotion. World Health Organization, Geneva: .
Harvard
World Health Organization, . (1988). Ethical criteria for medicinal drug promotion. World Health Organization, Geneva: .
MLA
World Health Organization, . Ethical criteria for medicinal drug promotion. World Health Organization, Geneva: . 1988.