Cita APA

Grotzinger, J., Jordan, T. H., Press, F., & Siever, R. (2007). Understanding Earth (5.).

Chicago Edition Citation

Grotzinger, John, Thomas H. Jordan, Frank Press, i Raymond Siever. Understanding Earth. 5. Newyork, W H Freeman & Co, 2007.

Cita MLA

Grotzinger, John, et al. Understanding Earth. 5. 2007.