Dyfyniad APA

(1997). Chemical engineering progress. : American Institute of Chemical Engineers.

Dyfyniad Arddull Chicago

Chemical Engineering Progress. Philadelphia: : American Institute of Chemical Engineers, 1997.

Dyfyniad MLA

Chemical Engineering Progress. : American Institute of Chemical Engineers, 1997.

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