APA (7e ed.) Bronvermelding

Gorr, W. L., & Kurland, K. S. (2007). Learning and using geographic information systems: ArcGIS edition. Thomson Course Technology.

Chicago (17e ed.) Bronvermelding

Gorr, Wilpen L., en Kristen S. Kurland. Learning and Using Geographic Information Systems: ArcGIS Edition. Australia: Thomson Course Technology, 2007.

MLA (9e ed.) Bronvermelding

Gorr, Wilpen L., en Kristen S. Kurland. Learning and Using Geographic Information Systems: ArcGIS Edition. Thomson Course Technology, 2007.