APA (7th ed.) Citation

Phifer, R. L. Petroleum review. Phifer Petroleum Publications.

Chicago Style (17th ed.) Citation

Phifer, Robert L. Petroleum Review. Houston: Phifer Petroleum Publications.

MLA (9th ed.) Citation

Phifer, Robert L. Petroleum Review. Phifer Petroleum Publications.

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