Dyfyniad APA

Prothero, D. R., & Dott, R. H. (2010). Evolution of the Earth (8th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Prothero, Donald R., and Robert H. Dott. Evolution of the Earth. 8th ed. Dubuque, IA: McGraw-Hill, 2010.

Dyfyniad MLA

Prothero, Donald R., and Robert H. Dott. Evolution of the Earth. 8th ed. McGraw-Hill, 2010.

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