Cita APA (7th ed.)

Christopherson, R. W. (2013). Elemental geosystems (7th edition.). Pearson.

Cita Chicago (17th ed.)

Christopherson, Robert W. Elemental Geosystems. 7th edition. London: Pearson, 2013.

Cita MLA (8th ed.)

Christopherson, Robert W. Elemental Geosystems. 7th edition. Pearson, 2013.