Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.