Cita APA (7th ed.)

Plummer, C. C., Carlson, D. H., & Hammersley, L. (2016). Physical geology (Fifteenth edition.). McGraw-Hill/Education, Inc.

Cita Chicago (17th ed.)

Plummer, Charles C., Diane H. Carlson, i Lisa Hammersley. Physical Geology. Fifteenth edition. New York, NY: McGraw-Hill/Education, Inc, 2016.

Cita MLA (9th ed.)

Plummer, Charles C., et al. Physical Geology. Fifteenth edition. McGraw-Hill/Education, Inc, 2016.