Dyfyniad APA

Wicander, R., & Monroe, J. S. (2016). Historical geology: Evolution of earth and life through time (Eight edition.). Cengage Learning.

Dyfyniad Arddull Chicago

Wicander, Reed, and James S. Monroe. Historical Geology: Evolution of Earth and Life Through Time. Eight edition. Boston, Massachusetts: Cengage Learning, 2016.

Dyfyniad MLA

Wicander, Reed, and James S. Monroe. Historical Geology: Evolution of Earth and Life Through Time. Eight edition. Cengage Learning, 2016.

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