Gaya APA
Sharp, Zachary. (2009).
Environment 09/10 (28th ed).
Boston:
McGraw-Hill.
Gaya Chicago
Sharp, Zachary.
Environment 09/10.
28th ed
Boston:
McGraw-Hill,
2009.
Text.
Gaya MLA
Sharp, Zachary.
Environment 09/10.
28th ed
Boston:
McGraw-Hill,
2009.
Text.
Gaya Turabian
Sharp, Zachary.
Environment 09/10.
28th ed
Boston:
McGraw-Hill,
2009.
Print.