APA (7th ed.) Citation

OnWord Press & Korte, G. B. (1997). The GIS book (4th ed.). OnWord Press.

Chicago Style (17th ed.) Citation

OnWord Press and George B. Korte. The GIS Book. 4th ed. Santa Fe: OnWord Press, 1997.

MLA (8th ed.) Citation

OnWord Press and George B. Korte. The GIS Book. 4th ed. OnWord Press, 1997.

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