Cita APA

A.I. Levorsen. (1985). Geology of Petroleum (2nd.). CBS.

Chicago Edition Citation

A.I. Levorsen. Geology of Petroleum. 2nd. NewDelhi: CBS, 1985.

Cita MLA

A.I. Levorsen. Geology of Petroleum. 2nd. CBS, 1985.

Atenció: Aquestes cites poden no estar 100% correctes.