APA (7th ed.) Citation

Langenkamp, R. D., & Langenkamp, R. D. (2014). Handbook of oil industry terms & phrases (6th edition.). PenWell Corporation.

Chicago Style (17th ed.) Citation

Langenkamp, Robert D., and R. Dobie Langenkamp. Handbook of Oil Industry Terms & Phrases. 6th edition. Tulsa, Oklahoma: PenWell Corporation, 2014.

MLA (9th ed.) Citation

Langenkamp, Robert D., and R. Dobie Langenkamp. Handbook of Oil Industry Terms & Phrases. 6th edition. PenWell Corporation, 2014.

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