APA
World Health Organization no.764, . (1988). Rheumatic fever and rheumatic heart disease. World Health Organisation, Geneva: .
Chicago
World Health Organization no.764, . 1988. Rheumatic fever and rheumatic heart disease. World Health Organisation, Geneva: .
Harvard
World Health Organization no.764, . (1988). Rheumatic fever and rheumatic heart disease. World Health Organisation, Geneva: .
MLA
World Health Organization no.764, . Rheumatic fever and rheumatic heart disease. World Health Organisation, Geneva: . 1988.