Dyfyniad APA

Goudie, A. (2001). The nature of the environment (4th ed.). Blackwell Publishers.

Dyfyniad Arddull Chicago

Goudie, Andrew. The Nature of the Environment. 4th ed. Oxford, UK ; Malden, Mass.: Blackwell Publishers, 2001.

Dyfyniad MLA

Goudie, Andrew. The Nature of the Environment. 4th ed. Blackwell Publishers, 2001.

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