APA (7th ed.) Citation

(1990). Understanding GIS: The ARC/INFO method ; PC version (Rev.).

Chicago Style (17th ed.) Citation

Understanding GIS: The ARC/INFO Method ; PC Version. Rev. Redlands, CA, 1990.

MLA (9th ed.) Citation

Understanding GIS: The ARC/INFO Method ; PC Version. Rev. 1990.

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