Cita APA

 Troeh, F. R. (2003).  Dictionary of Agricultural and Environmental Science.  Iowa State Press.

Chicago Style Citation

 Troeh, Frederick R.  Dictionary of Agricultural and Environmental Science.  Iowa State Press, 2003.

Cita MLA

 Troeh, Frederick R.  Dictionary of Agricultural and Environmental Science.  Iowa State Press, 2003.

Atenció: Aquestes cites poden no estar 100% correctes.