Gaya APA
National Geographic. (2010).
Jakarta:
National Geographic.
Gaya Chicago
National Geographic.
.
Jakarta:
National Geographic,
2010.
Terbitan Berseri.
Gaya MLA
National Geographic.
.
Jakarta:
National Geographic,
2010.
Terbitan Berseri.
Gaya Turabian
National Geographic.
Jakarta:
National Geographic,
2010.
Terbitan Berseri.