Dyfyniad APA

Cunningham, W. P. (2006). Principles of environmental science: Inquiry and applications. Boston: McGraw-Hill.

Dyfyniad Arddull Chicago

Cunningham, William P. Principles of Environmental Science: Inquiry and Applications. Boston: McGraw-Hill, 2006.

Dyfyniad MLA

Cunningham, William P. Principles of Environmental Science: Inquiry and Applications. Boston: McGraw-Hill, 2006.

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