Gaya APA
INTRODUCTION TO GEOGRAPHY. (2011).
New York:
Mc Graw Hill.
Gaya Chicago
INTRODUCTION TO GEOGRAPHY.
Ed, 30.
New York:
Mc Graw Hill,
2011.
.
Gaya MLA
INTRODUCTION TO GEOGRAPHY.
Ed, 30.
New York:
Mc Graw Hill,
2011.
.
Gaya Turabian
INTRODUCTION TO GEOGRAPHY.
New York:
Mc Graw Hill,
2011.
.