Agricultural Conservation : A Guide to Programs.
MLA
Library of Congress. Agricultural Conservation : A Guide to Programs. [Place of publication not identified] : [publisher not identified], 2011.
APA
Library of Congress. (2011). Agricultural Conservation : A Guide to Programs. [Place of publication not identified] : [publisher not identified].
Chicago
Library of Congress. Agricultural Conservation : A Guide to Programs. [Place of publication not identified] : [publisher not identified], 2011.