Não informado. Kansas geographer. Kansas Council for Geographic Education.
Chicago-Zitierstil (17. Ausg.)Não informado. Kansas Geographer. Manhattan, Kan: Kansas Council for Geographic Education.
MLA-Zitierstil (8. Ausg.)Não informado. Kansas Geographer. Kansas Council for Geographic Education.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.