APA Edition Citation

Levorsen, A. I. (1972). Geology of petroleum. Vakils, Feffer and Simons.

Chicago Edition Citation

Levorsen, A I. Geology of Petroleum. Bombay: Vakils, Feffer and Simons, 1972.

MLA Edition Citation

Levorsen, A I. Geology of Petroleum. Vakils, Feffer and Simons, 1972.

Warning: These citations may not always be 100% accurate.