APA (7e ed.) Bronvermelding

Não informado. (2017). The Petroleum Engineer. Petroleum Engineer Publishing.

Chicago (17e ed.) Bronvermelding

Não informado. The Petroleum Engineer. Dallas, Tex: Petroleum Engineer Publishing, 2017.

MLA (8e ed.) Bronvermelding

Não informado. The Petroleum Engineer. Petroleum Engineer Publishing, 2017.

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