Gaya APA
Environmental Geology. (2008).
New York:
McGraw-Hill.
Gaya Chicago
Environmental Geology.
Ed.9.
New York:
McGraw-Hill,
2008.
.
Gaya MLA
Environmental Geology.
Ed.9.
New York:
McGraw-Hill,
2008.
.
Gaya Turabian
Environmental Geology.
New York:
McGraw-Hill,
2008.
.