APA Style
National Geographic September 2008. (2008).
:
National Geographic Society.
Chicago Style
National Geographic September 2008.
.
:
National Geographic Society,
2008.
Book - Paperback.
MLA Style
National Geographic September 2008.
.
:
National Geographic Society,
2008.
Book - Paperback.
Turabian Style
National Geographic September 2008.
:
National Geographic Society,
2008.
Book - Paperback.