Dyfyniad APA

Allen, D. T. (1997). Pollution prevention for chemical processes. New York: John wiley & Sons, Inc.

Dyfyniad Arddull Chicago

Allen, David T. Pollution Prevention for Chemical Processes. New York: John wiley & Sons, Inc, 1997.

Dyfyniad MLA

Allen, David T. Pollution Prevention for Chemical Processes. New York: John wiley & Sons, Inc, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.