APA (7th ed.) Citation

(1990). Understanding GIS: The ARC/INFO method. Environmental Systems Research Institute, Inc.

Chicago Style (17th ed.) Citation

Understanding GIS: The ARC/INFO Method. New York: Environmental Systems Research Institute, Inc, 1990.

MLA (8th ed.) Citation

Understanding GIS: The ARC/INFO Method. Environmental Systems Research Institute, Inc, 1990.

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