APA (7e ed.) Bronvermelding

Não informado. (1956). National Library of Medicine Catalog. National Library of Medicine.

Chicago (17e ed.) Bronvermelding

Não informado. National Library of Medicine Catalog. Washington: National Library of Medicine, 1956.

MLA (8e ed.) Bronvermelding

Não informado. National Library of Medicine Catalog. National Library of Medicine, 1956.

Let op: Deze citaties zijn niet altijd 100% accuraat.