Gaya APA
Earth Science. (2005).
New York:
McGraw Hill Book Company.
Gaya Chicago
Earth Science.
.
New York:
McGraw Hill Book Company,
2005.
Text.
Gaya MLA
Earth Science.
.
New York:
McGraw Hill Book Company,
2005.
Text.
Gaya Turabian
Earth Science.
New York:
McGraw Hill Book Company,
2005.
Print.