APA ציטוט

Gorr, W. L. (2007). Learning and using geographic information systems: ArcGIS edition. Boston, MA: Thomson Course Technology.

Trích dẫn kiểu Chicago

Gorr, Wilpen L. Learning and Using Geographic Information Systems: ArcGIS Edition. Boston, MA: Thomson Course Technology, 2007.

ציטוט MLA

Gorr, Wilpen L. Learning and Using Geographic Information Systems: ArcGIS Edition. Boston, MA: Thomson Course Technology, 2007.