Não informado. Kansas geographer. Kansas Council for Geographic Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Kansas Geographer. Manhattan, Kan: Kansas Council for Geographic Education.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Kansas Geographer. Kansas Council for Geographic Education.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.