APA (7th ed.) Citation

(1969). Worldwide petrochemical directory. PennWell Pub. Co..

Chicago Style (17th ed.) Citation

Worldwide Petrochemical Directory. Tulsa, Okla.: PennWell Pub. Co., 1969.

MLA (9th ed.) Citation

Worldwide Petrochemical Directory. PennWell Pub. Co., 1969.

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