Dyfyniad APA

Miller, G. T. (1999). Environmental science: Working with the Earth (7th ed.). Wadsworth Publishing Company.

Dyfyniad Arddull Chicago

Miller, G. Tyler. Environmental Science: Working with the Earth. 7th ed. Belmont, Calif.: Wadsworth Publishing Company, 1999.

Dyfyniad MLA

Miller, G. Tyler. Environmental Science: Working with the Earth. 7th ed. Wadsworth Publishing Company, 1999.

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