Não informado. World cartography. United Nations, Department of Social Affairs.
Chicago-Zitierstil (17. Ausg.)Não informado. World Cartography. New York: United Nations, Department of Social Affairs.
MLA-Zitierstil (8. Ausg.)Não informado. World Cartography. United Nations, Department of Social Affairs.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.