Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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