Não informado. (2009). Occasional Publications of the Department of Geography. University of Illinois at Urbana-Champaign.
Chicagoスタイル(17版)引用形式Não informado. Occasional Publications of the Department of Geography. Urbana, Ill: University of Illinois at Urbana-Champaign, 2009.
MLA(8版)引用形式Não informado. Occasional Publications of the Department of Geography. University of Illinois at Urbana-Champaign, 2009.
警告: この引用は必ずしも正確ではありません.