APA Edition Citation

Bernhardsen, T. (2007). Geograhic Information Systems an introduction.

Chicago Edition Citation

Bernhardsen, Tor. Geograhic Information Systems an Introduction. NewYork, JhonWiley & Sons, 2007.

MLA Edition Citation

Bernhardsen, Tor. Geograhic Information Systems an Introduction. 2007.

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