Dyfyniad APA

 Sawyer, C. N. (2003).  Chemistry for environmental engineering and science.  McGraw-Hill.

Dyfyniad Arddull Chicago

 Sawyer, Clair N.  Chemistry for Environmental Engineering and Science.  McGraw-Hill, 2003.

Dyfyniad MLA

 Sawyer, Clair N.  Chemistry for Environmental Engineering and Science.  McGraw-Hill, 2003.

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