APA (7th ed.) Citation

Frankel, P. H. (1969). Essentials of petroleum: A key to oil economics ([2d ed.].). F. Cass.

Chicago Style (17th ed.) Citation

Frankel, Paul H. Essentials of Petroleum: A Key to Oil Economics. [2d ed.]. London: F. Cass, 1969.

MLA (8th ed.) Citation

Frankel, Paul H. Essentials of Petroleum: A Key to Oil Economics. [2d ed.]. F. Cass, 1969.

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