APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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