APA (7th ed.) Citation

Bernhardsen, T. (2002). Geographic information systems: An introduction (3rd ed.). John Wiley & Sons.

Chicago Style (17th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems: An Introduction. 3rd ed. New York, NY: John Wiley & Sons, 2002.

MLA (8th ed.) Citation

Bernhardsen, Tor. Geographic Information Systems: An Introduction. 3rd ed. John Wiley & Sons, 2002.