APA引文

 Tollner, E. W. (2002).  Natural resources engineering.  Iowa State University Press.

Trích dẫn kiểu Chicago

 Tollner, Ernest W.  Natural Resources Engineering.  Iowa State University Press, 2002.

MLA引文

 Tollner, Ernest W.  Natural Resources Engineering.  Iowa State University Press, 2002.

警告：這些引文格式不一定是100％准確.