APA Style
Trees as a farm crop /. (1988).
Oxford ;:
Boston.
Chicago Style
Trees as a farm crop /.
Cet.4.
Oxford ;:
Boston,
1988.
Text.
MLA Style
Trees as a farm crop /.
Cet.4.
Oxford ;:
Boston,
1988.
Text.
Turabian Style
Trees as a farm crop /.
Oxford ;:
Boston,
1988.
Print.