Não informado. (1960). Medical Subject Headings. National Library of Medicine.
Chicago (17e ed.) BronvermeldingNão informado. Medical Subject Headings. Bethesda, Md: National Library of Medicine, 1960.
MLA (8e ed.) BronvermeldingNão informado. Medical Subject Headings. National Library of Medicine, 1960.
Let op: Deze citaties zijn niet altijd 100% accuraat.