APA-referens

Gorr, W. L. (2006). Learning and using geographic information systems: ArcExplorer edition. Boston, MA: Thomson Course Technology.

Chicago-stil citat

Gorr, Wilpen L. Learning and Using Geographic Information Systems: ArcExplorer Edition. Boston, MA: Thomson Course Technology, 2006.

MLA-referens

Gorr, Wilpen L. Learning and Using Geographic Information Systems: ArcExplorer Edition. Boston, MA: Thomson Course Technology, 2006.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.