Gaya APA

Physical geology : earth revealed / David McGeary, Charles C. Plummer, Diane H. Carlson. (2004). : Boston, Mass : McGraw-Hill.

Gaya MLA

Physical geology : earth revealed / David McGeary, Charles C. Plummer, Diane H. Carlson. 5th ed.. : Boston, Mass : McGraw-Hill, 2004. Text.