Dyfyniad APA

 Rittmann, B. E. (2001).  Environmental biotechnology: Principles and applications.  McGraw-Hill.

Dyfyniad Arddull Chicago

 Rittmann, Bruce E.  Environmental Biotechnology: Principles and Applications.  McGraw-Hill, 2001.

Dyfyniad MLA

 Rittmann, Bruce E.  Environmental Biotechnology: Principles and Applications.  McGraw-Hill, 2001.

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