APA (7e ed.) Bronvermelding

Não informado. (1960). Birth defects. National Foundation.

Chicago (17e ed.) Bronvermelding

Não informado. Birth Defects. New York: National Foundation, 1960.

MLA (8e ed.) Bronvermelding

Não informado. Birth Defects. National Foundation, 1960.

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