Penggayaan APA
Organic Farming. (2010).
:
United States of .
Chicago Style
Organic Farming.
.
:
United States of ,
2010.
Text.
MLA Style
Organic Farming.
.
:
United States of ,
2010.
Text.
Turabian Style
Organic Farming.
:
United States of ,
2010.
Print.