APA (7e ed.) Bronvermelding

Não informado. (1978). Metalworking, Engineering and Marketing. News Digest.

Chicago (17e ed.) Bronvermelding

Não informado. Metalworking, Engineering and Marketing. Nagoya, Japão: News Digest, 1978.

MLA (8e ed.) Bronvermelding

Não informado. Metalworking, Engineering and Marketing. News Digest, 1978.

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