APA (7th ed.) Citation

Directories Publishing Company. (1986). Chem sources-international. Directories Pub. Co. Inc..

Chicago Style (17th ed.) Citation

Directories Publishing Company. Chem Sources-international. Clemson, S.C.: Directories Pub. Co. Inc., 1986.

MLA (9th ed.) Citation

Directories Publishing Company. Chem Sources-international. Directories Pub. Co. Inc., 1986.

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