APA (7th ed.) Citation

PennWell Publishing Company. (1993). U.S.A. oil industry's environmental directory. PennWell Pub. Co..

Chicago Style (17th ed.) Citation

PennWell Publishing Company. U.S.A. Oil Industry's Environmental Directory. Tulsa, OK: PennWell Pub. Co., 1993.

MLA (9th ed.) Citation

PennWell Publishing Company. U.S.A. Oil Industry's Environmental Directory. PennWell Pub. Co., 1993.

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