APA
W.H.O Tech.Rep series no.721, . (1985). Viral hemorrhagic fevers. W.H.O, Geneva: .
Chicago
W.H.O Tech.Rep series no.721, . 1985. Viral hemorrhagic fevers. W.H.O, Geneva: .
Harvard
W.H.O Tech.Rep series no.721, . (1985). Viral hemorrhagic fevers. W.H.O, Geneva: .
MLA
W.H.O Tech.Rep series no.721, . Viral hemorrhagic fevers. W.H.O, Geneva: . 1985.