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