Dyfyniad APA

 Harrison, R. M. (2007).  Principles of environmental chemistry.  Royal Society of Chemistry.

Dyfyniad Arddull Chicago

 Harrison, Roy M.  Principles of Environmental Chemistry.  Royal Society of Chemistry, 2007.

Dyfyniad MLA

 Harrison, Roy M.  Principles of Environmental Chemistry.  Royal Society of Chemistry, 2007.

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