Dyfyniad APA

Dott, R. H., & Prothero, D. R. (1994). Evolution of the earth (5th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Dott, Robert H., and Donald R. Prothero. Evolution of the Earth. 5th ed. New York: McGraw-Hill, 1994.

Dyfyniad MLA

Dott, Robert H., and Donald R. Prothero. Evolution of the Earth. 5th ed. McGraw-Hill, 1994.

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