APA (7e ed.) Bronvermelding

Não informado. (1961). Society of Petroleum Engineers Journal. Society of Petroleum Engineers.

Chicago (17e ed.) Bronvermelding

Não informado. Society of Petroleum Engineers Journal. Dallas, Tex: Society of Petroleum Engineers, 1961.

MLA (8e ed.) Bronvermelding

Não informado. Society of Petroleum Engineers Journal. Society of Petroleum Engineers, 1961.

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