Dyfyniad APA

Cunningham, W. P. (2005). Environmental science: A global concern. McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P. Environmental Science: A Global Concern. Boston: McGraw-Hill, 2005.

Dyfyniad MLA

Cunningham, William P. Environmental Science: A Global Concern. McGraw-Hill, 2005.

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