Não informado. (2003). Geospatial Solutions. Advanstar Communications.
Chicagoスタイル(17版)引用形式Não informado. Geospatial Solutions. Duluth, Minn: Advanstar Communications, 2003.
MLA(8版)引用形式Não informado. Geospatial Solutions. Advanstar Communications, 2003.
警告: この引用は必ずしも正確ではありません.