Gaya APA

J., S., C., P. (2000). The Dynamic Earth an introduction to physical geology, 4th.ed. . New York: John Wiley and Sons, Inc..

Gaya MLA

J., Skinner,Brian., C., Porter,Stephen. "The Dynamic Earth an introduction to physical geology, 4th.ed.". New York: John Wiley and Sons, Inc., 2000. Text.