Dyfyniad APA

Dott, R. H., & Batten, R. L. (1988). Evolution of the earth (4th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Dott, Robert H., and Roger Lyman Batten. Evolution of the Earth. 4th ed. New York: McGraw-Hill, 1988.

Dyfyniad MLA

Dott, Robert H., and Roger Lyman Batten. Evolution of the Earth. 4th ed. McGraw-Hill, 1988.

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