Grotzinger, J., Jordan, T. H., Press, F., & Siever, R. (2007). Understanding Earth (5.).
Chicago Edition CitationGrotzinger, John, Thomas H. Jordan, Frank Press, i Raymond Siever. Understanding Earth. 5. Newyork, W H Freeman & Co, 2007.
Cita MLAGrotzinger, John, et al. Understanding Earth. 5. 2007.
Atenció: Aquestes cites poden no estar 100% correctes.