APA (7e ed.) Bronvermelding

Não informado. (1958). Lead Abstracts. Lead Development Association.

Chicago (17e ed.) Bronvermelding

Não informado. Lead Abstracts. London: Lead Development Association, 1958.

MLA (8e ed.) Bronvermelding

Não informado. Lead Abstracts. Lead Development Association, 1958.

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