APA (7th ed.) Citation

Davis, B. E. (1996). GIS: A visual approach (1. ed.). Onword Press.

Chicago Style (17th ed.) Citation

Davis, Bruce E. GIS: A Visual Approach. 1. ed. Santa Fe, NM: Onword Press, 1996.

MLA (9th ed.) Citation

Davis, Bruce E. GIS: A Visual Approach. 1. ed. Onword Press, 1996.