APA引文

 Keller, E. A. (2011).  Environmental geology.  Pearson Prentice Hall.

Trích dẫn kiểu Chicago

 Keller, Edward A.  Environmental Geology.  Pearson Prentice Hall, 2011.

MLA引文

 Keller, Edward A.  Environmental Geology.  Pearson Prentice Hall, 2011.

警告：這些引文格式不一定是100％准確.