APA-referens (7:e uppl.)

Carlson, D. H., Plummer, C. C., & Hammersley, L. (2011). Physical geology: Earth revealed (9th ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Carlson, Diane H., Charles C. Plummer, och Lisa Hammersley. Physical Geology: Earth Revealed. 9th ed. New York: McGraw-Hill, 2011.

MLA-referens (9:e uppl.)

Carlson, Diane H., et al. Physical Geology: Earth Revealed. 9th ed. McGraw-Hill, 2011.