Dyfyniad APA

Cunningham, W. P. (2005). Environmental Science: A Global Concern with OLC (Hardcover). New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P. Environmental Science: A Global Concern With OLC (Hardcover). New York: McGraw-Hill, 2005.

Dyfyniad MLA

Cunningham, William P. Environmental Science: A Global Concern With OLC (Hardcover). New York: McGraw-Hill, 2005.

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