APA (7e ed.) Bronvermelding

Não informado. (1990). Cartography and geographic information systems. American Congress on Surveying and Mapping.

Chicago (17e ed.) Bronvermelding

Não informado. Cartography and Geographic Information Systems. Bethesda, Md: American Congress on Surveying and Mapping, 1990.

MLA (8e ed.) Bronvermelding

Não informado. Cartography and Geographic Information Systems. American Congress on Surveying and Mapping, 1990.

Let op: Deze citaties zijn niet altijd 100% accuraat.