APA (7e ed.) Bronvermelding

Não informado. (1939). Journal of the Institute of Petroleum. Institute of Petroleum.

Chicago (17e ed.) Bronvermelding

Não informado. Journal of the Institute of Petroleum. London: Institute of Petroleum, 1939.

MLA (8e ed.) Bronvermelding

Não informado. Journal of the Institute of Petroleum. Institute of Petroleum, 1939.

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