Não informado. (1971). Influenza Bibliography. National Institute for Medical Research.
Chicago (17e ed.) BronvermeldingNão informado. Influenza Bibliography. London: National Institute for Medical Research, 1971.
MLA (8e ed.) BronvermeldingNão informado. Influenza Bibliography. National Institute for Medical Research, 1971.
Let op: Deze citaties zijn niet altijd 100% accuraat.