APA (7th ed.) Citation

Emmons, W. H. (1931). Geology of petroleum (2. ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Emmons, William H. Geology of Petroleum. 2. ed. New York [u.a.]: McGraw-Hill, 1931.

MLA (9th ed.) Citation

Emmons, William H. Geology of Petroleum. 2. ed. McGraw-Hill, 1931.