Παραπομπή APA

(1997). Understanding GIS: The ARC/INFO method : self-study workbook, version 7.1 for UNIX and windows NT ([4th ed.].). Cambridge: GeoInformation International.

Παραπομπή Chicago Style

Understanding GIS: The ARC/INFO Method : Self-study Workbook, Version 7.1 for UNIX and Windows NT. [4th ed.]. Cambridge: GeoInformation International, 1997.

Παραπομπή MLA

Understanding GIS: The ARC/INFO Method : Self-study Workbook, Version 7.1 for UNIX and Windows NT. [4th ed.]. Cambridge: GeoInformation International, 1997.

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