APA Style
National Geographic. (2010).
USA:
National Geographic Society.
Chicago Style
National Geographic.
Vol.217/No.2/February 2010.
USA:
National Geographic Society,
2010.
Books.
MLA Style
National Geographic.
Vol.217/No.2/February 2010.
USA:
National Geographic Society,
2010.
Books.
Turabian Style
National Geographic.
USA:
National Geographic Society,
2010.
Books.