APA (7th ed.) Citation

Kohl, A. L., & Nielsen, R. (1997). Gas purification (5th ed.). Gulf Pub..

Chicago Style (17th ed.) Citation

Kohl, Arthur L., and Richard Nielsen. Gas Purification. 5th ed. Houston, Tex.: Gulf Pub., 1997.

MLA (9th ed.) Citation

Kohl, Arthur L., and Richard Nielsen. Gas Purification. 5th ed. Gulf Pub., 1997.