Dyfyniad APA

Cunningham, W. P. (2003). Environmental science: A global concern. Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2003.

Dyfyniad MLA

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2003.

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