APA (7e ed.) Bronvermelding

Não informado. (1961). API Abstracts of Refining Patents. American Petroleum Institute.

Chicago (17e ed.) Bronvermelding

Não informado. API Abstracts of Refining Patents. New York: American Petroleum Institute, 1961.

MLA (8e ed.) Bronvermelding

Não informado. API Abstracts of Refining Patents. American Petroleum Institute, 1961.

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