Gaya APA
Introduction to Geography. (2011).
New York:
McGraw-Hill.
Gaya Chicago
Introduction to Geography.
Ed.13.
New York:
McGraw-Hill,
2011.
.
Gaya MLA
Introduction to Geography.
Ed.13.
New York:
McGraw-Hill,
2011.
.
Gaya Turabian
Introduction to Geography.
New York:
McGraw-Hill,
2011.
.