Gaya APA
Field, B, C. (1994).
Environmental Economics An Introduction .
New York:
McGraw-Hill.
Gaya Chicago
Field, B, C..
Environmental Economics An Introduction.
New York:
McGraw-Hill,
1994.
Text.
Gaya MLA
Field, Barry, C.
"Environmental Economics An Introduction".
New York:
McGraw-Hill,
1994.
Text.
Gaya Turabian
Field, Barry, C..
Environmental Economics An Introduction.
New York:
McGraw-Hill,
1994.
Print.