Cita APA

Christopherson, R. W., & Birkeland, G. H. (2016). Elemental geosystems (Eighth edition.). Pearson.

Chicago Edition Citation

Christopherson, Robert W., i Ginger H. Birkeland. Elemental Geosystems. Eighth edition. NewYork: Pearson, 2016.

Cita MLA

Christopherson, Robert W., i Ginger H. Birkeland. Elemental Geosystems. Eighth edition. Pearson, 2016.

Atenció: Aquestes cites poden no estar 100% correctes.