Cita APA (7th ed.)

Plummer, C. C., Carlson, D. H., & Hammersley, L. Physical geology (Seventeenth edition.).

Cita Chicago (17th ed.)

Plummer, Charles C., Diane H. Carlson, i Lisa Hammersley. Physical Geology. Seventeenth edition.

Cita MLA (9th ed.)

Plummer, Charles C., et al. Physical Geology. Seventeenth edition.