Não informado. (1990). Cartography and geographic information systems. American Congress on Surveying and Mapping.
Chicagoスタイル(17版)引用形式Não informado. Cartography and Geographic Information Systems. Bethesda, Md: American Congress on Surveying and Mapping, 1990.
MLA(8版)引用形式Não informado. Cartography and Geographic Information Systems. American Congress on Surveying and Mapping, 1990.
警告: この引用は必ずしも正確ではありません.