APA (7th ed.) Citation

(1997). Understanding GIS: The ARC/INFO method ([4th ed.].). Environmental Systems Research Institute.

Chicago Style (17th ed.) Citation

Understanding GIS: The ARC/INFO Method. [4th ed.]. Environmental Systems Research Institute, 1997.

MLA (8th ed.) Citation

Understanding GIS: The ARC/INFO Method. [4th ed.]. Environmental Systems Research Institute, 1997.

Warning: These citations may not always be 100% accurate.