APA (7th ed.) Citation

(1997). Worldwide offshore petroleum directory. PennWell Publishing Co..

Chicago Style (17th ed.) Citation

Worldwide Offshore Petroleum Directory. Houston, TX: PennWell Publishing Co., 1997.

MLA (9th ed.) Citation

Worldwide Offshore Petroleum Directory. PennWell Publishing Co., 1997.

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