APA Style
National geographic: a special issue water our thirsty world vol.217 no.4. (2010).
Washington, D.C:
the National Geographic Society.
Chicago Style
National geographic: a special issue water our thirsty world vol.217 no.4.
april 2010.
Washington, D.C:
the National Geographic Society,
2010.
Text.
MLA Style
National geographic: a special issue water our thirsty world vol.217 no.4.
april 2010.
Washington, D.C:
the National Geographic Society,
2010.
Text.
Turabian Style
National geographic: a special issue water our thirsty world vol.217 no.4.
Washington, D.C:
the National Geographic Society,
2010.
Print.