Cita APA (7a ed.)

Levorsen, A. I. (1954). Geology of petroleum. Freeman.

Cita Chicago Style (17a ed.)

Levorsen, A. I. Geology of Petroleum. California: Freeman, 1954.

Cita MLA (8a ed.)

Levorsen, A. I. Geology of Petroleum. Freeman, 1954.