APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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