Dyfyniad APA

Grotzinger, J., & ...[et al.]. (2007). Understanding earth (5th ed.). W.H. Freeman and Company.

Dyfyniad Arddull Chicago

Grotzinger, John, and ...[et al.]. Understanding Earth. 5th ed. New York: W.H. Freeman and Company, 2007.

Dyfyniad MLA

Grotzinger, John, and ...[et al.]. Understanding Earth. 5th ed. W.H. Freeman and Company, 2007.

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