APA-referens (7:e uppl.)

Wicander, R., & Monroe, J. S. (2010). Historical geology: Evolution of earth and life through time (6th ed.). Thomson-Brooks/Cole.

Chicago-referens (17:e uppl.)

Wicander, Reed, och James S. Monroe. Historical Geology: Evolution of Earth and Life Through Time. 6th ed. Belmont, Calif: Thomson-Brooks/Cole, 2010.

MLA-referens (9:e uppl.)

Wicander, Reed, och James S. Monroe. Historical Geology: Evolution of Earth and Life Through Time. 6th ed. Thomson-Brooks/Cole, 2010.