Cita APA (7th ed.)

Plummer, C. C., Carlson, D. H., & Hammersley, L. (2013). Physical geology (14a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Plummer, Charles C., Diane H. Carlson, i Lisa Hammersley. Physical Geology. 14a. ed. Nueva York: McGraw-Hill, 2013.

Cita MLA (9th ed.)

Plummer, Charles C., et al. Physical Geology. 14a. ed. McGraw-Hill, 2013.