APA (7th ed.) Citation

Hughes, W. E. (2016). Fundamentals of international oil and gas law. PennWell Corporation.

Chicago Style (17th ed.) Citation

Hughes, William E. Fundamentals of International Oil and Gas Law. Tulsa, Oklahoma: PennWell Corporation, 2016.

MLA (9th ed.) Citation

Hughes, William E. Fundamentals of International Oil and Gas Law. PennWell Corporation, 2016.

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