Gaya APA
Getis, A.
(2011).
Introduction To Geography (13th Edition)
(
Edisi 13)
.
USA:
McGrawHill Companies.
Gaya MLA
Getis, Arthur.
"Introduction To Geography (13th Edition)".
Edisi 13
USA:
McGrawHill Companies,
2011.
FKIP-Geografi.