Cita APA (7a ed.)

Plummer, C. C., McGeary, D., & Carlson, D. H. (2005). Physical geology (10th ed.). McGraw - Hill.

Cita Chicago Style (17a ed.)

Plummer, Charles C., David McGeary, y Diane H. Carlson. Physical Geology. 10th ed. Boston: McGraw - Hill, 2005.

Cita MLA (9a ed.)

Plummer, Charles C., et al. Physical Geology. 10th ed. McGraw - Hill, 2005.