Dyfyniad APA

D.Enger Eldon, & F.Smith Bradley. (2006). Environmental Science: A Study Of Interrelationships. American: McGraw -Hill.

Dyfyniad Arddull Chicago

D.Enger Eldon, và F.Smith Bradley. Environmental Science: A Study Of Interrelationships. American: McGraw -Hill, 2006.

Dyfyniad MLA

D.Enger Eldon, và F.Smith Bradley. Environmental Science: A Study Of Interrelationships. American: McGraw -Hill, 2006.

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