APA (7e ed.) Bronvermelding

Não informado. (1978). API Abstracts/Patents. American Petroleum Institute.

Chicago (17e ed.) Bronvermelding

Não informado. API Abstracts/Patents. New York: American Petroleum Institute, 1978.

MLA (8e ed.) Bronvermelding

Não informado. API Abstracts/Patents. American Petroleum Institute, 1978.

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