Cita APA (7a ed.)
Levorsen A. I. (1985). Geology of petroleum (2nd ed.). CBS Pub.
Cita Chicago Style (17a ed.)
Levorsen A. I. Geology of Petroleum. 2nd ed. New Delhi: CBS Pub, 1985.
Cita MLA (9a ed.)
Levorsen A. I. Geology of Petroleum. 2nd ed. CBS Pub, 1985.
Precaución: Estas citas no son 100% exactas.