Não informado. (2003). ARC News. Environmental Systems Research Institute.
Chicagoスタイル(17版)引用形式Não informado. ARC News. Redlands, Calif: Environmental Systems Research Institute, 2003.
MLA(8版)引用形式Não informado. ARC News. Environmental Systems Research Institute, 2003.
警告: この引用は必ずしも正確ではありません.